Novak Djokovic comfortably retained his world No.1 spot in the ATP, as France's Richard Gasquet returned to the top 10 after winning his second tournament of the year at the Sud de France Open on Sunday.
Former world N.1 Rafael Nadal remains in fifth place despite reaching the final of an ATP event in Chile as the top four remain the same, with Roger Federer, Andy Murray and David Ferrer also standing in front of the Spaniard's comeback bid.
Argentina's Horacio Zeballos who was ranked 73rd in the world, denied Nadal a fairytale finish to his comeback tournament, rallying to hand the Spaniard a rare clay court defeat 6-7 (2/7), 7-6 (8/6), 6-4.
Croatian Marin Cilic won on home soil for the third time at the Zagreb Open by destroying Austrian Jurgen Melzer 6-3, 6-1 in just 67 minutes as he climbs to 12th.
ATP world top 20
1. Novak Djokovic (SRB) 12,960 pts
2. Roger Federer (SUI) 10,265
3. Andy Murray (GBR) 8,480
4. David Ferrer (ESP) 6,865
5. Rafael Nadal (ESP) 5,550
6. Tomas Berdych (CZE) 4,575
7. Juan Martin Del Potro (ARG) 4,210
8. Jo-Wilfried Tsonga (FRA) 3,515
9. Janko Tipsarevic (SRB) 3,125
10. Richard Gasquet (FRA) 2,925
11. Nicolas Almagro (ESP) 2,695
12. Marin Cilic (CRO) 2,210
13. Milos Raonic (CAN) 2,305
14. Gilles Simon (FRA) 2,235
15. Juan Monaco (ARG) 2,220
16. John Isner (USA) 2,125
17. Stanislas Wawrinka (SUI) 1,990
18. Andreas Seppi (ITA) 1,765
19. Philipp Kohlschreiber (GER) 1,720
20. Sam Querrey (USA) 1,695