Roger Federer wins opener
LONDON -- Roger Federer opened his quest for a seventh season-ending tour title, looking like the man to beat again.
The 17-time Grand Slam champion won his record 40th match at the tournament, defeating Janko Tipsarevic 6-3, 6-1 Tuesday in his opening Group B match.
Federer lost only eight points on his serve under the roof of the O2 Arena while converting four of his nine break points in the event that features the top eight players in the world.
"Obviously, come in ...
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