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.
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.
Round-up: Top seed David Ferrer beat Gael Monfils 6-3 6-2 as he opened his bid for a fourth Valencia Open.
Janko Tipsarevic’s Valencia Open campaign was over almost as soon as it began in his first-round tie against Marcel Granollers.
John Isner was pushed hard before coming through a tough opening match at the Shanghai Masters.
Roger Federer has no plans to retire despite his struggles to find his form in 2013.
The paths to the US Open men's semi-finals to be played on Saturday at the US National Tennis Center in Flushing Meadows, New York.
Touted as a leading member of 'Generation Next', Milos Raonic beat Feliciano Lopez 6-7(4) 6-4 6-3 6-4 at the US Open.
Order of play for day six of the US Open, with Rafael Nadal, Roger Federer, Victoria Azarenka and Dan Evans on court.
Roger Federer and Serena Williams, stress-free and loving the limelight, strolled into the third round of the US Open.
Order of play for day four of the US Open, with Rafa Nadal, Roger Federer, Serena Williams and Victoria Azarenka all on court.
Order of play for day one of the US Open, with Rafael Nadal, Roger Federer, Serena Williams and Laura Robson all in action.
ATP World Tour Finals
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