As the US hard-court swing begins, the Top 20 are mostly holding firm to their spots in the rankings. Karolina Pliskova remains on top of the tree, with Simona Halep, Angelique Kerber, Garbiñe Muguruza and Elina Svitolina rounding out the Top 5.

The only exception is Latvia's Anastasija Sevastova, up one place to No.16 after her run to the quarterfinals at the Ericsson Open, where she was seeded second but was knocked out by eventual champion Katerina Siniakova.

Here are the other most notable WTA Rankings movers this week:

Peng Shuai (+9, No.32 to No.23): The 31-year-old grabbed her second WTA title at the Jiangxi Open, making the most of playing on home soil. She was taken to a decider only once in the tournament - in her first-round match against Kurumi Nara of Japan.

Katerina Siniakova (+17, No.56 to No.39): The Ericsson Open champion defeated the tournament's top three seeds to lift the trophy - including top seed Caroline Wozniacki in the final, 6-3, 6-4.

Elise Mertens (+8, No.55 to No.47): Another player who had an excellent run in Bastad, her big scalp was that of fifth seed Carla Suárez Navarro in the round of 16, beating her 6-3, 6-7(2), 7-5. She put up a good fight against Wozniacki in the semifinal, taking her to a decider, but eventually falling 7-5, 4-6, 6-2.

Nao Hibino (+20, No.92 to No.72): She reached the final of the Jiangxi Open despite being unseeded, losing to Peng Shuai in straight sets. It was her first singles final since losing to Ashleigh Barty at the Malaysian Open in March.

Aleksandra Krunic (+9, No.96 to No.87): The 24-year-old reached the Bastad quarterfinals where she lost to Elise Mertens; she defeated qualifier Cornelia Lister and lucky loser Viktoriya Tomova along the way.