Cape Town - South Africa's top tennis player Kevin Anderson climbed three places to reach a career-high 16th in the latest ATP World Tour men's singles rankings, released on Monday.
Anderson, who was previously ranked 19th, reached the second round of the Japan Open in Tokyo last week, where he was ousted 4-6, 4-6, by France's Jeremy Chardy.
He faces James Ward of Britain in the first round of the men's singles at the Shanghai Masters on Monday.
Meanwhile, South Africa's top doubles player, Raven Klaasen climbed one spot to 21.
ATP Top 20
1. Novak Djokovic (SRB) 12 1502. Rafael Nadal (ESP) 8 465
3. Roger Federer (SUI) 8 170
4. Stan Wawrinka (SUI) 5 555
5. David Ferrer (ESP) 4 495
6. Kei Nishikori (JPN) 4 435
7. Tomas Berdych (CZE) 4 235
8. Milos Raonic (CAN) 3 965
9. Marin Cilic (CRO) 3 935
10. Grigor Dimitrov (BUL) 3 710
11. Andy Murray (GBR) 3 545
12. Jo-Wilfried Tsonga (FRA) 3 065
13. Ernests Gulbis (LAT) 2 455
14. John Isner (USA) 1 925
15. Gal Monfils (FRA) 1 915
16. Kevin Anderson (RSA) 1 875
17. Fabio Fognini (ITA) 1 870
18. Roberto Bautista (ESP) 1 865
19. Juan Martin Del Potro (ARG) 1 865
20. Tommy Robredo (ESP) 1 750