Serena Williams of the United States has retained top spot in the latest world rankings released by the WTA Monday, while Wimbledon champion Petra Kvitova moved up to fourth.

Kvitova of the Czech Republic has gained two places from sixth but still trails Li Na (China) and Simona Halep (Romania) behind Williams, who is top with an advantage of 2,550 points.

The other big winner in the rankings is defeated Wimbledon finalist Eugenie Bouchard. The Canadian has broken into the top 10 in seventh position having started the latest grand slam in 13th.

WTA top 10 as of July 7 (previous ranking in parenthesis): 1. (1) Serena Williams, United States, 9,510 points 2. (2) Li Na, China, 6,960 3. (3) Simona Halep, Romania, 6,785 4. (6) Petra Kvitova, Czech Republic, 6,070 5. (4) Agnieszka Radwanska, Poland, 5,330 6. (5) Maria Sharapova, Russia, 4,881 7. (13)Eugenie Bouchard, Canada, 4,460 8. (7) Angelique Kerber, Germany, 4,365 9. (8) Jelena Jankovic, Serbia, 3,900 10. (9) Victoria Azarenka, Belarus, 3,812

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