Novak Djokovic stayed well clear of Switzerland's Roger Federer in the men's ATP tennis rankings released Monday.
The Serb, who enjoyed a 6-4, 6-3 defeat of Federer to win his fourth career title at the Rome Masters Sunday, has an unchanged 13,845 points, while Federer has improved to 9,235.
Among changes in the leading 10, Tomas Berdych of Czech Republic and Kei Nishikori of Japan both move up a place, to fourth and fifth respectively, while Canada's Milos Raonic drops two places to sixth.
ATP top 10 as of May 18 (previous ranking in parenthesis):
1 (1) Novak Djokovic, Serbia, 13,845 points
2 (2) Roger Federer, Switzerland, 9,235
3 (3) Andy Murray, Britain, 7,040
4 (5) Tomas Berdych, Czech Republic, 5,230
5 (6) Kei Nishikori, Japan, 5,220
6 (4) Milos Raonic, Canada, 4,800
7 (7) Rafael Nadal, Spain, 4,570
8 (8) David Ferrer, Spain, 4,490
9 (9) Stanislas Wawrinka, Switzerland, 3,845
10 (10) Marin Cilic, Croatia, 3,325
