Round-up: Novak Djokovic kicked off the defence of his title with a 6-3 6-3 win over Denis Istomin in Dubai.
British tennis's upturn in fortunes continued as Dan Evans made it into the second round of the Zagreb Indoors tournament.
Round-up: Fifth seed Juan Martin Del Potro was on the end of a huge shock when losing 4-6 6-3 5-7 6-4 7-5 to Roberto Bautista Agut.
Round-up: The Australian Open ended early for John Isner after the American number one retired from his match against Martin Klizan.
First round draw for the men's singles after qualifying at the Australian Open.
Rafael Nadal edged a tight contest with Ernests Gulbis to advance to the semi-finals of the Qatar Open.
Lleyton Hewitt responded to the roars from the Pat Rafter Arena to oust sixth seed Feliciano Lopez 7-5 6-3 in Brisbane.
Andy Murray's preparations for the Australian Open were dealt a blow as he crashed out of the Qatar Open against Germany's Florian Mayer.
Round-up: Ivo Karlovic held his nerve in two tie-breaks to knock out Tomas Berdych in straight sets at the Qatar Open.
Roger Federer put his recent poor form behind him to beat Adrian Mannarino 6-4 6-2 in his home city of Basel.
Teenage wildcard Karen Khachanov shocked third seed Janko Tipsarevic in straight sets at the Kremlin Cup in Moscow.
Feliciano Lopez came through a tough clash with Jarkko Nieminen to make it through the opening round of the Shanghai Masters.
Andy Murray opened the defence of his US Open title with a masterly 6-2 6-4 6-3 thrashing of France's Michael Llodra.
Order of play for day three of the US Open, with Andy Murray and Serena Williams both in action.
ATP World Tour Finals
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