Berlin - Novak Djokovic extended his big lead in an unchanged top 10 in the ATP men's tennis rankings issued on Monday.
The three-time Australian Open champion from Serbia has 12,960 points, with Roger Federer of Switzerland falling back by nearly 400 points after losing in the quarter-finals in Rotterdam.
Briton Andy Murray third on 8,480.
ATP top 10 as of February 18 (previous ranking in parenthesis):
1. (1) Novak Djokovic, Serbia, 12 960 points
2. (2) Roger Federer, Switzerland, 9 855
3. (3) Andy Murray, Britain, 8 480
4. (4) David Ferrer, Spain, 6 865
5. (5) Rafael Nadal, Spain, 5 755
6. (6) Tomas Berdych, Czech Republic, 4 485
7. (7) Juan Martin del Potro, Argentina, 4 410
8. (8) Jo-Wilfried Tsonga, France, 3 515
9. (9) Janko Tipsarevic, Serbia, 3 125 10. (10) Richard Gasquet, France, 2 880