Serena Williams of the United States stayed just top of the women’s tennis rankings, while Dubai Open winner Petra Kvitova of the Czech Republic moved up a place to seventh in the list released on Monday by the WTA.

Williams has a slender 40-point lead over Victoria Azarenka of Belarus, after both withdrew with injuries from last week’s Dubai Open.

Kvitova swaps places in the top 10 with Italy’s Sara Errani, whom she defeated in Saturday’s final of the Dubai Open.

WTA top 10 as of February 25 (previous ranking in parenthesis): 1. (1) Serena Williams, United States, 10,365 points 2. (2) Victoria Azarenka, Belarus, 10,325 3. (3) Maria Sharapova, Russia, 9,715 4. (4) Agnieszka Radwanska, Poland, 7,505 5. (5) Li Na, China, 6,130 6. (6) Angelique Kerber, Germany, 5,400 7. (8) Petra Kvitova, Czech Republic, 4,980 8. (7) Sara Errani, Italy, 4,915 9. (9) Samantha Stosur, Australia, 3,835 10. (10) Caroline Wozniacki, Denmark, 3,570.

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