
The Australian, US Open and Wimbledon champion Federer has a big lead with 7,205 points in the latest list issued on Monday by the ATP. Spain's Rafael Nadal has 5,385 points and Serb Novak Djokovic 4,470 points.
Nalbandian, who beat Federer in three sets Sunday, rose from 25 to 18 as he bids to return into the top 10.
ATP top 10 as of October 22 (previous ranking in parenthesis)
1. (1) Roger Federer, Switzerland, 7,205 points
2. (2) Rafael Nadal, Spain, 5,385
3. (3) Novak Djokovic, Serbia, 4,470
4. (4) Nikolay Davydenko, Russia, 3,250
5. (5) Andy Roddick, United States, 2,430
6. (7) David Ferrer, Spain, 2,130
7. (8) James Blake, United States, 2,110
8. (6) Fernando Gonzalez, Chile 2,020
9. (9) Tommy Robredo, Spain, 1,965
10. (10) Thomas Haas, Germany, 1,870.