Novak Djokovic remains top of the world rankings despite his surprise defeat to lucky loser Lorenzo Sonego in Vienna last week, the ATP announced on Monday.
Djokovic made his return to the court in Austria having not played since Roland Garros and has now spent 293 weeks as the world's best player, edging closer to Roger Federer's record of 310.
The Serb 17-time Grand Slam winner is virtually guaranteed to equal Pete Sampras's record of securing a year-ending top ranking for the sixth time with second-placed Rafael Nadal unlikely to play at Sofia this month.
Italian Sonego rises to a career-best of 32nd after inflicting on Djokovic the worst three-set loss of his career.
This week, Nadal is in action at the Paris Masters and said on Sunday he was not worried about injuries which have ended his last two visits to the tournament.
Kevin Anderson back in top 100
Meanwhile, South Africa's Kevin Anderson is back in the world's top 100, rising 25 spots after his run to the semi-finals in Vienna.
In his last four encounter against Vienna champion Andrey Rublev, Anderson suffered a leg injury and had to retire while trailing 6-4, 4-1.
Anderson is now just three spots adrift of compatriot Lloyd Harris, who dropped three spots to 83rd.
ATP rankings as of 2 November:
1. Novak Djokovic (SRB) 11830 pts
2. Rafael Nadal (ESP) 9850
3. Dominic Thiem (AUT) 9125
4. Roger Federer (SUI) 6630
5. Daniil Medvedev (RUS) 5980 (+1)
6. Stefanos Tsitsipas (GRE) 5925 (-1)
7. Alexander Zverev (GER) 5015
8. Andrey Rublev (RUS) 3839
9. Diego Schwartzman (ARG) 3285
10. Matteo Berrettini (ITA) 3075
11. Gael Monfils (FRA) 2860
12. Denis Shapovalov (CAN) 2830
13. Roberto Bautista (ESP) 2710
14. David Goffin (BEL) 2555
15. Pablo Carreno (ESP) 2400
16. Fabio Fognini (ITA) 2400
17. Milos Raonic (CAN) 2265
18. Grigor Dimitrov (BUL) 2260 (+2)
19. Karen Khachanov (RUS) 2245 (-1)
20. Stan Wawrinka (SUI) 2230 (-1)
83. Lloyd Harris (RSA) 793 (-3)
86. Kevin Anderson (RSA) (+25) 780