The final Grand Slam of the 2021 season produced the first all-teen final in 22 years, causing a shakeup among this week's rankings. For the first time in six years, Britain has a new top player, while Canada boasts two women in the Top 30 for the first time in 34 years. And in doubles, there is a change atop the rankings.

Hsieh Su-Wei returns to doubles No.1

Hsieh Su-Wei returned to the top of the WTA doubles rankings this week, replacing Elise Mertens, who held the top spot for nine consecutive weeks. This week marks Hsieh's 40th career week at No.1. She returns to the top spot for the first time since the week of Feb. 15.

Hsieh and Mertens teamed up at the US Open. The top seeds advanced to the quarterfinals before falling to Coco Gauff and Caty McNally.

US Open champion’s ascension

US Open champion Emma Raducanu jumped 127 spots in this week's WTA Rankings, moving from No.150 to No.23. Raducanu started the year at No.345 (as the British No.11), but her ranking has been on a rapid climb in the past three months. The teenager has won 21 of her past 25 matches. After reaching the fourth round at Wimbledon as a wildcard, Raducanu's ranking improved from No.338 to No.179, helping her secure a spot in qualifying at the US Open. 

By winning the US Open as a qualifier, Raducanu earned 2,040 points. She also overtakes Johanna Konta as the highest-ranked woman from Britain. Konta had held the distinction for 310 consecutive weeks (since the week of Oct. 5, 2015).

Fernandez joins Top 30

US Open runner-up Leylah Fernandez jumped 45 spots, climbing from No.73 to No.28. Fernandez joins fellow Canadian Bianca Andreescu (No.20) in the Top 30, giving Canada two women ranked in that range for the first time in 34 years. The last time it happened was the week of Sept. 14, 1987, with Helen Kelesi at No.29 and Carling Bassett-Seguso at No.30.

WTA 125 title gives Sherif a boost

Egypt’s Mayar Sherif continued her breakthrough season. She moved to a career-high ranking of No.74, a 22-position improvement from No.96. After falling to Raducanu in the final round of qualifying at the US Open, Sherif quickly rebounded by capturing the title at the WTA 125 series event staged in Karlsruhe, Germany.

Sherif defeated Italy's Martina Trevisan in the championship match. The run to the final also allowed for Trevisan to reach a career-high ranking of No.79. She climbed 27 spots (from No.106).

Other notable rankings movements

While Ashleigh Barty and Aryna Sabalenka remain unchanged atop this week’s rankings, quarterfinal runs have pushed Karolina Pliskova up one spot to No.3 and Elina Svitolina up one to No.4.

Barbora Krejcikova and Maria Sakkari both hit new career highs. Roland Garros champion Krejcikova moved up two spots from No.9 to No.7 after reaching the quarterfinals on her US Open main-draw debut, while Sakkari climbed five spots from No.18 to No.13 after making her second Slam semifinal of the year.

Maria Sakkari

Getty Images

New milestones within the Top 100 include Coco Gauff, who rose four places to make her Top 20 debut at No.19; and Liudmila Samsonova, who broke the Top 50 for the first time with a four-spot rise to No.48. Both reached the second round of the US Open. Former World No.46 Oceane Dodin also returned to the Top 100 for the first time since April 2018, climbing eight places to No.95 after winning two US Open qualifying matches.

Belgium's Greet Minnen earned a spot in the US Open main draw as a lucky loser and made the most of her second chance by advancing to the third round for the first time at a Slam. The 24-year-old will make her Top 100 debut as a result - 21 months after first breaking the Top 110 in December 2019. Minnen moves up 26 spots from No.104 to No.78.

Kamilla Rakhimova also made the third round of the US Open as a lucky loser, and the 20-year-old Russian is boosted to the edge of the Top 100, rising 25 places to a new career-high of No.109.

Former Roland Garros junior champion Rebeka Masarova enjoyed a memorable Grand Slam debut, qualifying for the US Open and setting a joint record for the longest women's singles match in tournament history with her first-round win over Ana Bogdan. The 22-year-old Spaniard rockets up 53 places to No.179, breaking the Top 200 for the first time.

Australian 19-year-old Olivia Gadecki dealt out one of the biggest upsets of the year in February when, as an unranked wildcard, she stunned Sofia Kenin at the Phillip Island Trophy. Gadecki has been making steady progress since and rose 68 places to a new career high of No.257 after winning her first ITF W25 title in Vigo, Spain.

Wimbledon junior finalist Nastasja Schunk is also racing up the rankings. The 18-year-old German has won her first two ITF W25 events, both as a qualifier, in the past month, in Bydgoszcz, Poland and Braunschweig, Germany. She backed them up with a quarterfinal run in the Karlsruhe 125 and has jumped 147 places to No.294.

By winning the US Open doubles title, Zhang Shuai's doubles ranking improved 13 spots, moving to No.14 (from No.27), while Samantha Stosur climbed 34 spots, from No.55 to No.21.