Paris - Roger Federer remains on top of the latest ATP Tour world rankings released on Monday, as Kevin Anderson and Juan Martin del Potro were the only movers in the top 10 and Diego Schwartzman shot into the top 20.
Anderson and Del Potro each climb a place with Jack Sock dropping two spots to 10th.
Meanwhile, Argentina's Schwartzman is up five places to 18th after claiming the clay-court title in Rio de Janeiro on Sunday for the biggest win of his career. He beat Spain's Fernando Verdasco in the final.
Top 20 in the latest ATP Tour rankings:
1. Roger Federer (SWI) 10,105 pts
2. Rafael Nadal (ESP) 9,760
3. Marin Cilic (CRO) 4,960
4. Grigor Dimitrov (BUL) 4,635
5. Alexander Zverev (GER) 4,450
6. Dominic Thiem (AUT) 3,810
7. David Goffin (BEL) 3,280
8. Kevin Anderson (RSA) 2,825
9. Juan Martin Del Potro (ARG) 2,745
10. Jack Sock (USA) 2,650
11. Sam Querrey (USA) 2,595
12. Stanislas Wawrinka (SWI) 2,475
13. Novak Djokovic (SRB) 2,470
14. Pablo Carreno-Busta (ESP) 2,405
15. Lucas Pouille (FRA) 2,335
16. Nick Kyrgios (AUS) 2,305
17. Tomas Berdych (CZE) 2,275
18. Diego Schwartzman (ARG) 2,220
19. John Isner (USA) 2,205
20. Fabio Fognini (ITA) 1,985