Rankings Rockets: Zvonareva jumps 20 spots as Yastremska, Vekic hit new heights

Vera Zvonareva (+21, No.97 to No.76): A former WTA World No.2, the 34-year-old has leapt deep into the Top 100 thanks to a scintillating run in St Petersburg, beating Julia Goerges and Daria Kasatkina. (St. Petersburg Ladies Trophy/Bondareva)

Ekaterina Alexandrova (+13, No.78 to No.65): Won through five rounds in St Petersburg – including qualifying – to reach the quarterfinals. Rewarded with a new career-best ranking. (Bondareva/St. Petersburg Ladies Trophy)

Tamara Zidansek (+11, No.74 to No.63): The 21-year-old enjoyed a significant boost in her ranking as she reached the semifinals in Hua Hin. (Tournament)

Jessica Pegula (+11, No.104 to No.93): Jumped into the Top 100 for the first time by reaching the final of the ITF event in Midland, Miami. (Getty)

Veronika Kudermetova (+10, No.108 to No.98): Another Top 100 debutante, she reached the last 16 in St Petersburg as a lucky loser. (Getty)

Ajla Tomljanovic (+8, No.49 to No.41): The Australian is at her best-ever position after making the final of Hua Hin, where she was edged out by Yastremska in a third-set tiebreak. (Toyota Thailand Open)

Donna Vekic (+5, No.30 to No.25): Reached the final in St Petersburg, where Kiki Bertens proved too strong. Nevertheless, the Croat is at her best ranking ever. (St Petersburg Ladies Trophy/Bondareva)

Katie Boulter (+5, No.88 to No.83): Another to have hit a new high on the ladder, the British No.2 was a lucky loser in St Petersburg, where she was edged by Alexandrova. (St. Petersburg Ladies Trophy/Bondareva)