Berlin – World number one Serena Williams continued to dominate the latest women's tennis rankings issued by the WTA.
Williams tops the standings with 12,375 points, a large advantage over the chasing pack which is led by Li Na of China on 7,265.
There is one change in the top 10 as Serbian Jelena Jankovic moves up a place to seventh with Germany's Angelique Kerber dropping down to eighth.
WTA top 10 as of April 28 (previous ranking in parenthesis):
1. (1) Serena Williams, United States, 12,375 points
2. (2) Li Na, China, 7,265
3. (3) Agnieszka Radwanska, Poland, 5,980
4. (4) Victoria Azarenka, Belarus, 5,441
5. (5) Simona Halep, Romania, 4,695
6. (6) Petra Kvitova, Czech Republic, 4,295
7. (8) Jelena Jankovic, Serbia, 4,070
8. (7) Angelique Kerber, Germany, 4,010
9. (9) Maria Sharapova, Russia, 3,961
10. (10) Dominika Cibulkova, Slovakia, 3,830 – Sapa-dpa