LONDON: World number 1 Novak Djokovic tightened his grip at the top of the ATP rankings published on Monday after his straight sets Italian Open win over Roger Federer.
The Swiss, defeated 6-4, 6-3 by the Serb champ on Sunday, remains second ahead of Scot Andy Murray.
Rafael Nadal, knocked out in the quarter-finals in Rome, sits on seventh just behind Canadian Milos Raonic, who dropped two places.
As a result Tomas Berdych of Czech Republic and Kei Nishikori of Japan moved up to fourth and fifth place respectively.
ATP rankings on May 18:
1. Novak Djokovic (SRB) 13,845 pts
2. Roger Federer (SUI) 9,235
3. Andy Murray (GBR) 7,040
4. Tomas Berdych (CZE) 5,230 (+1)
5. Kei Nishikori (JPN) 5,220 (+1)
6. Milos Raonic (CAN) 4,800 (-2)
7. Rafael Nadal (ESP) 4,570
8. David Ferrer (ESP) 4,490
9. Stan Wawrinka (SUI) 3,845
10. Marin Cilic (CRO) 3,325