Berlin - Novak Djokovic continues to lead the men's world tennis rankings released by the ATP on Monday.
The only movement in the top 10 sees Stanlislas Wawrinka of Switzerland up a place to ninth, with Croatia's Marin Cilic down to 10th.
Serbia's Djokovic remains on 13 845 points, ahead of Switzerland's Roger Federer on 8 385 and Britain's Andy Murray on 6 060.
ATP top 10 as of April 27 (previous ranking in parenthesis):
1. (1) Novak Djokovic, Serbia, 13 845 points 2. (2) Roger Federer, Switzerland, 8 385 3. (3) Andy Murray, Britain, 6 060 4. (4) Rafael Nadal, Spain, 5 390 5. (5) Kei Nishikori, Japan, 5 280 6. (6) Milos Raonic, Canada, 5 070 7. (7) Tomas Berdych, Czech Republic, 4 960 8. (8) David Ferrer, Spain, 4 490 9. (10) Stanislas Wawrinka, Switzerland, 3 495 10.(9) Marin Cilic, Croatia, 3 405