Jo-Wilfried Tsonga double-faulted on match point to lose to Kei Nishikori and fail to qualify for the World Tour Finals.
Novak Djokovic started his Paris Masters campaign with a routine second-round 7-6(3) 6-3 win over Pierre-Hugues Herbert.
Roger Federer's unhappy season continued on Sunday when he lost to Juan Martin del Potro in the final of the Basel Open.
Mikhail Youzhny denied David Ferrer a fourth Valencia Open title when he beat the world number three 6-3 7-5.
Mikhail Youzhny will face David Ferrer in the final of the ATP Tour event in Valencia after the two came through their semis.
David Ferrer stepped up when it mattered to post a 6-4 4-6 6-0 win over Jerzy Janowicz and reach the semi-finals in Valencia.
The gulf between Australian tennis great Rod Laver and the nation's brightest hope Bernard Tomic has been starkly highlighted this week.
Sixth seed Gilles Simon was shocked by Alejandro Falla 6-1 6-0 in the opening round of the ATP tournament in Valencia.
ATP World Tour rankings on Monday (last week's positions in brackets):
ATP World Tour rankings on Monday (Last week's positions in brackets):
Novak Djokovic and Rafa Nadal can set up a delectable US Open final between the top two players in the world.
ATP World Tour Finals
View : 39344 times
View : 23425 times
View : 20268 times
View : 19352 times
View : 18483 times
Find detailed TV schedules for all Eurosport channel.
Find all the sports news on iPhone, BlackBerry, Android and iPad.
Follow up to the minute sports reports with Eurosport.