Djokovic extends lead as world No 1

Paris - Novak Djokovic extended his massive lead at the top of the ATP world rankings, which were released on Monday, following his fourth straight victory at the season-ending World Tour Finals in London.

The Serbian's straight sets win over Roger Federer in Sunday's final pushed his advantage over world number two Andy Murray to almost 8 000 points.

British number one Murray, who is gearing up for this week's Davis Cup final against Belgium, is guaranteed to finish the year number two for the first time, which should give him the second seeding at January's Australian Open.

The top 20 was otherwise unchanged with Federer only 405 points behind Murray, Stan Wawrinka at number four and Rafael Nadal retaining fifth spot.

ATP rankings

1. Novak Djokovic (SRB) 16 585 points

2. Andy Murray (GBR) 8 670

3. Roger Federer (SUI) 8 265

4. Stan Wawrinka (SUI) 6 865

5. Rafael Nadal (ESP) 5 230

6. Tomas Berdych (CZE) 4 620

7. David Ferrer (ESP) 4 305

8. Kei Nishikori (JPN) 4 235

9. Richard Gasquet (FRA) 2 850

10. Jo-Wilfried Tsonga (FRA) 2 635

11. John Isner (USA) 2 495

12. Kevin Anderson (RSA) 2 475

13. Marin Cilic (CRO) 2 405

14. Milos Raonic (CAN) 2 170

15. Gilles Simon (FRA) 2 145

16. David Goffin (BEL) 1 805

17. Feliciano Lopez (ESP) 1 690

18. Bernard Tomic (AUS) 1 675

19. Benot Paire (FRA) 1 633

20. Dominic Thiem (AUT) 1 600