Maria Sharapova (RUS) No.13 to No.9
Return to Top 10; 240th career week in Top 10, first 239 coming consecutively between July 5, 2004 and February 1, 2009
Andrea Petkovic (GER) No.23 to No.19
Top 20 debut; reached semifinals in Miami, scoring back-to-back wins over Wozniacki and Jankovic before falling to Sharapova; first German to beat a reigning No.1 in a full match since Graf in 1999
Peng Shuai (CHN) No.32 to No.30
Top 30 debut; becomes third Chinese ever to crack Top 30, after Li and Zheng; reached fourth round in Miami, falling to Dulgheru
Greta Arn (HUN) No.51 to No.50
Top 50 debut; nine days shy of 32nd birthday, veteran and recent Auckland champion breaks into Top 50 for first time in career
Arantxa Rus (NED) No.104 to No.99
Top 100 debut; Dutch rising star breaks into Top 100 for first