LONDON, Nov. 16 (Xinhua) -- Roger Federer won his third consecutive match at the ATP Finals after fighting back from one set down to beat fifth seed Marin Cilic at the O2 Arena here on Thursday.
The second seed needed one hour and 54 minutes to win 6-7 (5), 6-4, 6-1 to finish Group Boris Becker play 3-0. It's the 10th time Federer has ended group play unbeaten.
The six-time ATP Finals champion thus extended his unbeaten run to 13 matches, including eight indoors, dating back to his Swiss Indoors Basel title run.
The 19-time Grand Slam champion will take on either David Goffin or Dominic Thiem from Group Pete Sampras, where Grigor Dimitrov has secured the first place.
"I played very well so really happy to be playing at this level right now," Federer said on court after his 55th ATP Finals win.
