There's a new WTA World No.1 - but Sloane Stephens's meteoric rise up the rankings is the most notable climb of the week.
WTA Staff
September 11, 2017

Garbiñe Muguruza has stepped up to the top of the WTA Rankings - but US Open champion Sloane Stephens's meteoric rise is the most notable climb of the week.

The American has leapt up 66 places - from 83 to 17 - and it is all the more incredible as she is still on a comeback after foot surgery. Unseeded in New York, she beat eleventh seed Dominika Cibulkova, 16th seed Anastasija Sevastova and ninth seed Venus Williams en route to the final - where she beat her friend and 15th seed Madison Keys.

Here are the other most notable rankings movers this week:

Julia Goerges (+7, No.33 to No.26): Seeded 30th at Flushing Meadows, the German had a good run - she beat Annika Beck 6-1, 6-0, Zheng Saisai 6-2, 6-1, and Aleksandra Krunic 6-3, 6-3 before falling to eventual champion Sloane Stephens in the round of 16.

Daria Kasatkina (+7, No.38 to No.31): The Russian impressed when she knocked French Open champion Jelena Ostapenko out in New York, triumphing in straight sets 6-3, 6-2. She departed the tournament in the round of 16, though, losing 6-4, 6-4 to Kaia Kanepi.

Jennifer Brady (+26, No.91 to No.65): The 22-year-old had the home crowd behind her at the US Open, helping her to wins over Andrea Petkovic (6-4, 3-6, 6-1), 23rd seed Barbora Strycova (6-1, 6-1) and Monica Niculescu (6-3, 4-6, 7-6). She came up against then-World No.1 Karolina Pliskova in the round of 16, though, losing 6-1, 6-0 in just 46 minutes.

Aleksandra Krunic (+11, No.78 to No.67): The 24-year-old got off to a flying start in New York, beating seventh seed Johanna Konta 4-6, 6-3, 6-4, following that up with a straight-sets win over Ajla Tomljanovic, 6-3, 6-2. Her run was finally halted by Germany's Julia Goerges.

Maria Sakkari (+13, No.95 to No.82): Greece's Sakkari had her best-ever run at the US Open, starting with a 6-3, 6-4 win over 24th seed Kiki Bertens. She beat Arina Rodionova 7-5, 6-3 in the round of 64, but was eventually knocked out by Venus Williams 6-3, 6-4. 

Kateryna Kozlova (+35, No.118 to No.83): The No.5 seed claimed the title at the Dalian Open, beating former World No.2 Vera Zvonareva 6-4, 6-2 in the final. She also qualified for the US Open, winning her first-round match against Irina-Camelia Begu 6-2, 7-6, before falling to eventual quarterfinalist Anastasija Sevastova 6-4, 6-4.

Ons Jabeur (+10, 99 to 89): The 23-year-old Tunisian continued her excellent 2017 at the US Open, falling in the round of 16 to eventual semifinalist CoCo Vandeweghe 7-6, 6-2.