The 28-year-old from Leeds heads an unchanged top 20 list, ahead of fellow countryman Nick Matthew at two; FrenchmanGregory Gaultier in third place; and Egyptians Ramy Ashour and Karim Darwish at four and five, respectively.

Australian Mike Corren, the only winner of two PSA World Tour titles in June, moves up eight places to No77. Success in the Barossa Valley Open in South Australia – the 38-year-old’s fourth title triumph of the year – marked the 41st Tour title of Corren’s career.

Corren went on to reach a further final last month – at the South Australian Open in Adelaide – but this time lost out to compatriot Rex Hedrick. The 23-year-old from Melbourne also celebrates a ranking rise – moving up five places to a career-high 71.

But Jamaican Christopher Binnie celebrates one of the biggest moves of the month after winning the British Virgin Islands Open.

The US-based 23-year-old marched through the inaugural Tour event in the Caribbean as a qualifier – dismissing three of the event’s top four seeds to make history by becoming the first Jamaican to win a PSA Tour title.

July 2012 top 20 (inc. points average):

El Shorbagy, the reigning world junior champion, clinched the British Junior U19 Open title in January to extend his lead at the top of the men’s rankings to more than 30 points. The 18-year-old from Alexandria has topped the rankings since their launch in October last year.

Title success in both the French Junior U19 Open in February and the German Junior U19 Open last month takes England’s Oliver Holland up to second place in the list.

Egypt’s Mohamed Abouelghar retains third place and Indian Mahesh Mangaonkar drops to four – while Richie Fallows, runner-up to fellow countryman Holland both in the French and German Opens, rises 12 places to No5.

Egypt’s Nour El Sherbini has leap-frogged Emily Whitlock to replace the English teenager at the top of the women’s rankings. Alexandria-based El Sherbini, who is just 16 years old, celebrated her fifth British Junior Open success in January by winning the U19 trophy for the second time.

After a surprise semi-final British Junior Open exit in January, Whitlock is bidding to defend her European Junior Championship title this week in Portugal – but success in the Belgian & Swiss Junior Opens late last year have contributed towards her second place.

India’s Anaka Alankamony slips to third place – while France’s Julia Lecoq jumps five positions to No4 after winning theFrench Junior U19 Open against expectations.

Nele Gilis becomes the highest-ranked Belgian in the list. The 16-year-old leaps 25 places to No6 after winning the Czech Junior U19 Open.

The WSF World Junior Circuit Rankings - based on the under-19 age grouping and launched last October – are issued quarterly, based on results achieved in national junior opens, regional championships and WSF World Junior Individual Championships.

Men’s top 10:

Women’s top 10:

Full Lists

El Shorbagy, aged 18 and from Alexandria, is the reigning world junior champion after winning the WSF Men’s World Junior Individual Championship crown in Belgium in July – since when he has made rapid progress in the PSA world rankings.

Title success in the Indian Junior Open in September helped India’s 17-year-old Mahesh Mangaonkar move up to second place – pushing Egypt’s Mohamed Abouelghar, runner-up to El Shorbagy in Belgium, down to No3.

Dutchman Tom de Mulder bursts into the rankings for the first time at No4 after a runner-up finish in October’s Nordic Junior Open in Sweden.

After winning the Canadian Junior Open, then finishing in third place later last month in the US Junior Open, MexicanMario Yanez also makes his first appearance in the list at No5.

Emily Whitlock, the 17-year-old British national junior champion, is rewarded for her focus and success on the world junior circuit by taking over the top spot – succeeding Egypt’s world junior champion Nour El Tayeb.

Whitlock, who became the European Junior champion for the first time last April, added the Belgian Junior Open title to her trophy collection in November.

And India’s Anaka Alankamony also moved up in the list to take over second place. The 17-year-old from Chennai followed her unexpected success in last year’s Asian Junior Championships by winning the Indian Junior Open in her home city September.

American Maria Elena Ubina, 16-year-old winner of the US Junior Open, leaps up to fifth place, below Egyptians Nour El Tayeb and Nour El Sherbini, at 3 and 4, respectively

The WSF World Junior Circuit Rankings – which are based on the under 19 age grouping and were launched last October – will be issued quarterly, based on results achieved in national junior opens, regional championships and WSF World Junior Individual Championships. In the coming months, as players compete in more events (there are sixteen already on the circuit in the first half of the year), players will have more results with which to find a level.

Men’s top 10:

Women’s top 10:

Full Rankings

The 28-year-old from Leeds succeeds England team-mate and fellow Yorkshireman Nick Matthew, who has headed the world rankings since January 2011.

It was a stunning end-of-year run on the PSA World Tour that led Willstrop, who first reached world No2 six years ago, to overtake his great rival and become the 17th world No1 of all-time – and the fourth Englishman, following Matthew, fellow Yorkshireman Lee Beachill, and Peter Nicol.

Willstrop completed the best four-week run of his career this month in India when he won the Punj Lloyd PSA Masters in New Delhi – immediately following World Series title triumphs at the Cathay Pacific Sun Hung Kai Financial Hong Kong Open and the Kuwait PSA Cup.

“It’s been a tremendous week since India,” said the new world No1. “It came at a good time as it gave me the opportunity to think about it, to celebrate it and enjoy it.

“You work at this for a long time – you aim at the top but when it happens, it’s quite a lot to take in. I’m thrilled to have achieved it.

“The act of reaching world number one is really satisfying – but the most satisfying thing about it for me is sharing it with all the people who have helped me. I am so grateful to them – and without them it wouldn’t have been the same.”

Willstrop competes in his first event as world number one next week at The Queen’s Club in London, where he is the top seed in the ATCO PSA World Series Finals - the flagship PSA event which features the eight players who have earned the most points from the nine PSA World Series championships in 2011.

“Being introduced as ‘world number one’ at my first event next week in my home country will be very special – I can’t pretend otherwise,” added Willstrop.

“It’ll be magic – it’s what dreams are made of!”

Matthew is at two in the January rankings, ahead of Frenchman Gregory Gaultier at No3, and a trio of Egyptians Ramy Ashour, Karim Darwish and Mohamed El Shorbagy.

El Shorbagy, winner of the Macau Open in November, went on to reach successive World Series semi-finals in both the Kuwait PSA Cup and PSA Masters – and is celebrating a career-high No6 ranking in the new list.

Dutchman Laurens Jan Anjema and Malaysian Mohd Azlan Iskandar have both moved up to career-high-equalling positions of 9 and 10, respectively.

But also in the list are Egyptian Tarek Momen, who moves up two places to a best-ever No18, and two top 20 debutantsSimon Rosner and Tom Richards.

Rosner leaps an impressive five places to take up 19th place – thus becoming Germany’s first top 20 player for more than 16 years. The five-time German champion achieved last 16 finishes in the last two World Series events of the year, and at the Kuwait PSA Cup claimed one of the best scalps of his career when he beat Egypt’s Amr Shabana in straight games.

Richards leads the next wave of top England players and made his senior international debut in 2011. The 25-year-old from Surrey made the second round of the PSA Masters after upsetting Egypt’s Hisham Mohamed Ashour.

January 2012 top 20 (inc. points average):

The 30-year-old from Sheffield rounded off the most successful year of his career in devastating style this month – firstly by winning the Saudi PSA World Open to become England’s first ever world champion, then by clinching the final PSA Super Series title of the year at the Punj Lloyd PSA Masters in New Delhi.

“It’s been a dream year,” admitted Matthew, who underwent career-threatening shoulder surgery in 2008 – and bounced back in 2010, not only winning two gold medals in the Commonwealth Games in October, but picking up seven PSA World Tour titles, including PSA Super Series trophies at the North American Open, the Sky Open in Egypt, theAustralian Open in Canberra, before the PSA Masters in India.

The year has been defined by the rivalry between Matthew and Ramy Ashour, the 23-year-old Egyptian who, after beginning the year as number one, then replacing the Englishman at the top of the rankings in September, now slips to second place behind Matthew.

But Ashour, despite an injury which prevented him from competing in the PSA Masters, still finished the year at the top of the 2010 PSA Super Series Rankings after reaching the final in all but one of the eight events in which he competed.

While Egypt’s Karim Darwish retains his third position, England’s James Willstrop moves up to fourth place after finishing as runner-up in both the World Open in Saudi Arabia and the PSA Masters in India.

Egypt’s four times world champion Amr Shabana also rises in the new list, to No5, while Frenchman Gregory Gaultierslips to sixth.

But Egypt’s 19-year-old Mohamed El Shorbagy – the youngest player in the world top 40 – continues his charge up the list by securing a career-high No9 ranking.

Daryl Selby also ends the year on a high, jumping three places to No10 to ensure that four Englishmen begin 2011 in the world top ten.

But Egypt now boasts a remarkable seven players in the top 20 after a stunning leap of 11 places by Hisham Mohd Ashour. The 28-year-old from Cairo - Ramy Ashour‘s older brother – celebrates a career-best 18th place after battling through to the PSA Masters semi-finals as the 14th seed.

January 2011 top 20 (inc. points average):

The new rankings come on the eve of the Saudi PSA World Open, the richest event in history which gets underway in Saudi Arabia – where it is being held for the first time – tomorrow (2 December).

Egypt’s Ramy Ashour is top of the list, marking his fourth successive month as world number one after strengthening his position following title success in last month’s PSA Super Series Kuwait Open.

The 23-year-old from Cairo is ahead of second-placed Englishman Nick Matthew and third-placed compatriot Karim Darwish.

But it is five PSA World Tour final appearances this year, including title successes in three, which have contributed toLaurens Jan Anjema‘s top ten debut. In October, the third-seeded Dutchman reached the final of the US Open against expectation – and last month notched up his 25th Tour final appearance on home soil at the Dutch Open in Rotterdam.

France’s Gregory Gaultier moves up to four in the new list to mark his highest placing since January. The 27-year-old from Aix-en-Provence reached the semi-finals in last month’s Kuwait Open and Qatar Classic.

Egypt’s 19-year-old Mohamed El Shorbagy – the youngest player in the world top 40 – returns to a best-ever tenth place.

December top 20 (inc. points average):

Ashour, who celebrates his 23rd birthday today, claimed his second 2010 PSA Super Series crown when he beat home hero James Willstrop in a four-game final.

His unexpected final berth as fifth seed sees Englishman Willstrop leap two places to No4 in the new list – behind compatriotNick Matthew at two, and Egyptian Amr Shabana at No3.

And Frenchman Thierry Lincou, a quarter-finalist in Manchester, also moves up – to No7 – after overtaking EnglishmanPeter Barker.

But perhaps the most notable riser in the top 20 is David Palmer, the distinguished Australian who notched up ten complete years in the world top ten in August. But within a few weeks of slipping to 12 in the September list, the 34-year-old from New South Wales reached the British GP semi-finals – and fully tested Ashour before the Egyptian ultimately prevailed.

“I haven’t been able to play a match like that for the last four or five months,” admitted Palmer, who is now back in the top 10 at No9.

While Dutchman Laurens Jan Anjema returns to his career-high No11 in the October rankings, Malaysian Ong Beng Heecelebrates his highest ranking for more than a year by jumping two places to 17.

And after a gap of five months without any Pakistan player in the top 20, Aamir Atlas Khan celebrates his return to the elite list. The 20-year-old from Peshawar has already claimed two PSA Tour titles this year, and made it to the last 16 of theBritish Grand Prix in Manchester.

October top 20 (inc. points average):

Perry, the 33-year-old from Belfast who boasts 11 national titles, enjoyed the best month of her international career in August when she scored her biggest success at the Australian Open, winning the WISPA Gold title in Canberra in stunning style.

The triumph, bringing her Tour title total to eight, takes Perry to her highest ranking since April 2006.

Kasey Brown consolidated her status as Australia’s No2 by leaping two places to a best-ever eighth place. The 25-year-old from New South Wales was a quarter-finalist in the latest two WISPA Gold events, the Singapore Masters in July andAustralian Open in August.

Egypt’s Raneem El Weleily also has cause for celebration after making her top ten debut at No10. The 21-year-old from Alexandria recorded her best ever run in a WISPA Gold event in July when she reached the Malaysian Open semi-finals – as a qualifier!

And Nicol David is joined in the top 20 by a fellow Malaysian for the first time for more than two years as a result of Low Wee Wern making her debut in the elite group at No20.

Also from Penang, 20-year-old Low Wee Wern was an unexpected quarter-finalist in the Malaysian Open and qualified to make the main draw of the Singapore Masters.

September top 20 (inc. points average):

The 22-year-old from Cairo first secured the top spot in January this year – but was replaced in June by England’s Nick Matthew, who arrived in Hong Kong with five successive PSA World Tour titles to his credit, including the previous two PSA Super Series events, the Sky Open and Australian Open.

But the 30-year-old top seed from Sheffield crashed out in the quarter-finals in Hong Kong, beaten for the first time in nine meetings by his England team-mate Peter Barker.

Matthew’s pole position would have been safe had Ashour not won the Super Series title. But, playing the best squash of his career, the Egyptian reached the climax, then battled to a stunning 10-12, 11-9, 11-9, 9-11, 11-9 win over France’sGregory Gaultier – also a former world number one – in a 90-minute final.

“That was a quality match – I’ll watch it over and over again to see what I did right, what I did wrong, and learn from it,” said a jubilant Ashour at the post-match presentations.

“Now I’m world number one it’s great, but we’ve still got lots of big tournaments coming up and my aim is to keep playing well and keep winning.”

Indeed Ashour and Matthew are seeded to face each other in September’s final of the ROWE British Grand Prix, the sixthPSA Super Series event of the year in England – an event which could result in further changes to the world ranking hierarchy.

Positions immediately below the top two remain unchanged, with Egyptians Amr Shabana and Karim Darwish holding onto third and fourth places, respectively, and England’s James Willstrop staying at six.

But his first semi-final berth in a PSA Super Series championship this year lifts Peter Barker to seventh place, while France’sThierry Lincou slips to No8.

And there is further Egyptian success with the world top ten debut of teenager Mohamed El Shorbagy. The 19-year-old from Alexandria, who is combining a squash career with studying for a degree at a University in the UK, made the last 16 in both the Australian Open and Hong Kong Open – and rises three places to a career-high No10.

September top 20 (inc. points average):

1 [2] Ramy Ashour EGY 1,408
2 [1] Nick Matthew ENG 1,361
3 [3] Amr Shabana EGY 897
4 [4] Karim Darwish EGY 890
5 [5] Gregory Gaultier FRA 818
6 [6] James Willstrop ENG 745
7 [8] Peter Barker ENG 569
8 [7] Thierry Lincou FRA 548
9 [9] Daryl Selby ENG 403
10 [13] Mohamed El Shorbagy EGY 393
11 [11] Wael El Hindi EGY 388
12 [10] David Palmer AUS 379
13 [12] Laurens Jan Anjema NED 373
14 [14] Mohd Azlan Iskandar MAS 350
15 [15] Adrian Grant ENG 344
16 [17] Cameron Pilley AUS 337
17 [16] Alister Walker ENG 328
18 [18] Stewart Boswell AUS 279
19 [19] Ong Beng Hee MAS 266
20 [20] Tarek Momen EGY 252

The 24-year-old from Cairo claimed her seventh WISPA World Tour title at the Hurghada International in her home country in May – when she celebrated her 24th appearance in a Tour final, and her seventh time in a row in the climax of the established Red Sea resort event.

Malaysia’s Nicol David moves into her fifth year at the top of the rankings after beginning her current reign in August 2006. The 26-year-old from Penang won last month’s CIMB Singapore Masters for the fourth successive year to celebrate the 46th Tour title of her career and her fifth WISPA Gold title of the year.

England’s Jenny Duncalf remains at No2, ahead of Australia’s Rachael Grinham at three, and compatriot Alison Waters, runner-up to David in Singapore, in fourth place.

Camille Serme also celebrates a career-best ranking in the new list – moving up a single place to No9 to become France’s highest-ranked woman of all-time. The 21-year-old from Creteil, in Paris, was a quarter-finalist in both last month’s CIMBMalaysian Open and CIMB Singapore Open.

Egypt’s Raneem El Weleily also has cause for celebration, rising to a career-high 11th place after reaching theMalaysian Open semi-finals as a qualifier.

August top 20 (inc. points average):

1 [1] Nicol David MAS 2883
2 [2] Jenny Duncalf ENG 1723
3 [3] Rachael Grinham AUS 1452
4 [4] Alison Waters ENG 1403
5 [6] Omneya Abdel Kawy EGY 1215
6 [7] Madeline Perry IRL 1038
7 [5] Natalie Grinham NED 1007
8 [8] Laura Massaro ENG 853
9 [10] Camille Serme FRA 638
10 [9] Kasey Brown AUS 635
11 [14] Raneem El Weleily EGY 546
12 [11] Engy Kheirallah EGY 534
13 [12] Samantha Teran MEX 522
14 [13] Vanessa Atkinson NED 478
15 [15] Jaclyn Hawkes NZL 465
16 [16] Annie Au HKG 436
17 [18] Donna Urquhart AUS 427
18 [19] Rebecca Chiu HKG 410
19 [17] Isabelle Stoehr FRA 407
20 [20] Joelle King NZL 373

Full WISPA reankings

Momen, at 20 in the latest list, reached the finals against expectations in his last two PSA World Tour appearances. The 22-year-old from Cairo upset higher-ranked Cameron Pilley and Mohd Azlan Iskandar to reach the climax of theIndian Challenger No7 in May, then this month made it through to the biggest final of his career at the 5-star CIMB Malaysian Open, after overcoming Australia’s Stewart Boswell and top-seeded compatriot Mohamed El Shorbagy.

It was Mohd Azlan Iskandar whowent on to win the Malaysian Open – his third title triumph in the event since 2004. The success sees the 28-year-old from Kuala Lumpur jump four places to 14 in the new rankings, while Mohamed El Shorbagy moves up a single place to No13.

England’s Nick Matthew extends his reign as world number one in the unchanged top ten, ahead of Egyptians Ramy Ashour, Amr Shabana and Karim Darwish, at two, three and four, respectively; Frenchman Gregory Gaultier at No5; and fellow countryman James Willstrop in sixth place.

August top 20 (inc. points average):

1 [1] Nick Matthew ENG 1,283
2 [2] Ramy Ashour EGY 1,190
3 [3] Amr Shabana EGY 968
4 [4] Karim Darwish EGY 858
5 [5] Gregory Gaultier FRA 700
6 [6] James Willstrop ENG 681
7 [7] Thierry Lincou FRA 524
8 [8] Peter Barker ENG 519
9 [9] Daryl Selby ENG 412
10 [10] David Palmer AUS 395
11 [11] Wael El Hindi EGY 380
12 [12] Laurens Jan Anjema NED 369
13 [14] Mohamed El Shorbagy EGY 359
14 [18] Mohd Azlan Iskandar MAS 350
15 [13] Adrian Grant ENG 334
16 [15] Alister Walker ENG 330
17 [16] Cameron Pilley AUS 309
18 [17] Stewart Boswell AUS 279
19 [19] Ong Beng Hee MAS 267
20 [23] Tarek Momen EGY 260

Full PSA Rankings

The 26-year-old from Penang first hit the top spot in January 2006 – then began her current uninterrupted reign as world number one from August in the same year.

With 44 WISPA Tour titles to her credit, Nicol David now boasts the longest run at the top of the world rankings since New Zealander Susan Devoy dominated the women’s game from the mid 80s to the early 90s.

England’s Jenny Duncalf is at two in the new list – ahead of Grinham sisters Rachael, who rises to three, and Natalie, who slips to four.

But two southern hemisphere players have much to celebrate in the June rankings: Australia’s Donna Urquhart jumps three places to a career-high No16 to consolidate her status as her country’s third highest-ranked player.

The 23-year-old left-hander from New South Wales has won four Tour titles and reached her ninth final at the Chairman’s Cup in Hong Kong in January.

And Joelle King doubles New Zealand interest in the top 20 by making her debut in the elite group. The 21-year-old from Cambridge has exceeded expectations in all four WISPA Tour events in which she has competed this year – and, unseeded, secured her fifth title at the Texas Open in the USA in April after beating top seed Rachael Grinham in the final!

June top 20 (inc. points average):

1 [1] Nicol David MAS 2883
2 [2] Jenny Duncalf ENG 1697
3 [4] Rachael Grinham AUS 1512
4 [3] Natalie Grinham NED 1363
5 [5] Alison Waters ENG 1363
6 [6] Omneya Abdel Kawy EGY 1214
7 [7] Madeline Perry IRL 1025
8 [8] Laura Massaro ENG 853
9 [9] Kasey Brown AUS 649
10 [10] Camille Serme FRA 648
11 [11] Samantha Teran MEX 540
12 [14] Engy Kheirallah EGY 537
13 [13] Vanessa Atkinson NED 522
14 [15] Jaclyn Hawkes NZL 454
15 [17] Raneem El Weleily EGY 452
16 [19] Donna Urquhart AUS 428
17 [20] Annie Au HKG 425
18 [16] Isabelle Stoehr FRA 423
19 [18] Rebecca Chiu HKG 412
20 [21] Joelle King NZL 400

Full WISPA Rankings

The 29-year-old from Sheffield becomes the 16th man to top the list since the world rankings were first introduced in the mid-70s – and the first Englishman since Lee Beachill was world number one in December 2004, which followed fellow countryman Peter Nicol‘s 60-month run between 1998 and 2004.

Matthew clinched the sport’s premier position after winning last month’s Sky Open, the third PSA Super Series event of the year in Egypt. The triumph marked his fourth Tour title of the year – and moved the British National champion ahead of rival Ramy Ashour, the Egyptian who had topped the rankings since January. Favourite Ashour suffered a surprise semi-final defeat in front of his home crowd in Cairo.

“Becoming world number one is every sports person’s dream and it’s something I’ve worked towards all of my squash life since I turned professional in 1998,” said Matthew on hearing the confirmation of his achievement. “The enormity of it certainly hasn’t sunk in yet (there’s something about being a squash player that keeps your feet firmly on the ground!) and at the time it certainly came out of the blue, as I had prepared myself to have to beat Ramy in front of all his fans in the final if I were to achieve my goal!

“Squash missing out on London 2012, and Rio 2016 for that matter, was a massive blow and hopefully this will give the sport of squash a much-needed boost in this country. England squash is currently enjoying its most successful period ever and hopefully, as a group, we can inspire the next generation of players.

“With the season being over now, it’s a great time to have achieved this,” Matthew added. “It means I can put my feet up for a few weeks and then come back refreshed and ready for the new challenge of holding on to the top spot. When I come back I will be reassessing my goals – and becoming World Champion and winning Commonwealth gold will be very high on the agenda.”

Alex Gough, the former world No5 who is now the PSA CEO, added: “There is no one out there at the minute that deserves this more than Nick. Over the last three or four years he has had more setbacks than anyone – but he has never once complained.

“Instead, fearlessly and relentlessly, he has come back time after time with this as the main goal in mind. It will have meant everything for him to reach world number one and he will not want to let this feeling go. The other guys on the Tour are going to have to double efforts to get it back from him.

“Squash is in a fantastic place at the moment, as any one of five or six players can win one of the major events – and this is leading to very high quality matches and tournaments. The second half the year starts again in Canberra, Australia for theAustralian Open in August – and all eyes will be on Nick Matthew to see how he handles the extra pressure.”

June top 20 (inc. points average):

1 [2] Nick Matthew ENG 1,283
2 [1] Ramy Ashour EGY 1,190
3 [3] Amr Shabana EGY 968
4 [4] Karim Darwish EGY 858
5 [6] Gregory Gaultier FRA 700
6 [5] James Willstrop ENG 681
7 [8] Thierry Lincou FRA 549
8 [7] Peter Barker ENG 519
9 [9] Daryl Selby ENG 412
10 [10] David Palmer AUS 395
11 [12] Wael El Hindi EGY 380
12 [11] Laurens Jan Anjema NED 372
13 [13] Adrian Grant ENG 334
14 [14] Mohamed El Shorbagy EGY 333
15 [15] Alister Walker ENG 330
16 [16] Cameron Pilley AUS 326
17 [17] Stewart Boswell AUS 310
18 [18] Mohd Azlan Iskandar MAS 285
19 [19] Ong Beng Hee MAS 266
20 [20] Omar Mosaad EGY 255

Full PSA Rankings

Malaysia’s Nicol David maintains her tight grip on top position in the list, extending her unbroken reign as world number one to 46 months after winning her 44th WISPA World Tour title – and her third in succession this year – at last month’s Cayman Islands Open.

But Camille Serme is celebrating the latest milestone in her brief career to date. Outside the top 30 a year ago, the 21-year-old from Creteil equals illustrious compatriot Isabelle Stoehr‘s career-best ranking of 10.

Voted the WISPA Most Improved Player of the Year last year and now the youngest player in the top ten, Serme already boasts five WISPA Tour titles – and in February reached her ninth final at the Creteil International Open at her home club in Paris.

England’s Jenny Duncalf holds onto second place in the new list, while Australian Rachael Grinham moves up to fourth place, just behind her younger sister Natalie Grinham at No3.

Another rising Australian is Kasey Brown, the New York-based 24-year-old from New South Wales who moves to a career-high world No9.

And Mexican Samantha Teran takes a step closer to the top ten by moving up a single place to a best-ever 11th place.

Further Australian success is marked by Donna Urquhart, the 23-year-old left-hander from New South Wales who celebrates a career-best 19 ranking.

May top 20 (inc. points average):

1 [1] Nicol David MAS 2997
2 [2] Jenny Duncalf ENG 1689
3 [3] Natalie Grinham NED 1534
4 [5] Rachael Grinham AUS 1487
5 [4] Alison Waters ENG 1354
6 [6] Omneya Abdel Kawy EGY 1184
7 [7] Madeline Perry IRL 1010
8 [8] Laura Massaro ENG 853
9 [10] Kasey Brown AUS 656
10 [11] Camille Serme FRA 644
11 [12] Samantha Teran MEX 580
12 [9] Natalie Grainger USA 575
13 [13] Vanessa Atkinson NED 522
14 [14] Engy Kheirallah EGY 502
15 [15] Jaclyn Hawkes NZL 478
16 [19] Isabelle Stoehr FRA 460
17 [16] Raneem El Weleily EGY 452
18 [17] Rebecca Chiu HKG 429
19 [20] Donna Urquhart AUS 428
20 [18] Annie Au HKG 425