Marin Cilic won his first match since returning from a doping ban with a 5-7 6-1 6-4 success against Igor Sijsling in Paris.
Tomas Berdych and Stanislas Wawrinka were both ousted from the Swiss Indoors event in Basel in surprise first-round results.
ATP round-up: Jo-Wilfried Tsonga was upset in straight sets by world number 63 Robin Haase in the Erste Bank Open semi-finals.
ATP round-up: Jo-Wilfried Tsonga edged a gripping quarter-final against Dominic Thiem to reach the Erste Bank Open semis.
Teenage wildcard Karen Khachanov shocked third seed Janko Tipsarevic in straight sets at the Kremlin Cup in Moscow.
Round-up: Novak Djokovic, Rafael Nadal and Roger Federer all moved into the last 16 at the Shanghai Masters.
Feliciano Lopez came through a tough clash with Jarkko Nieminen to make it through the opening round of the Shanghai Masters.
Serena Williams, Andy Murray and Novak Djokovic ensured normal service resumed at the last Grand Slam of year.
Andy Murray sailed along after winning a first-set tiebreaker to defeat Florian Mayer in straight sets to progress to round four.
Order of play for day five of the US Open, with Andy Murray, Novak Djokovic, Serena Williams and Laura Robson all expected on court.
Order of play for day three of the US Open, with Andy Murray and Serena Williams both in action.
Organisers have announced the seedings for the US Open and Roger Federer is seeded only seventh.
Round-up: Roger Federer got his hardcourt season off to a positive start with straightforward win over Phillip Kohlschreiber.
Round-up: Novak Djokovic made a solid return to action with a 6-2 6-1 win over Florian Mayer at the Montreal Masters.
Round-up: Florian Mayer defied his journeyman status to knock Bernard Tomic out in the first round of the Montreal Masters.
ATP World Tour Finals
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