Roger Federer battles into ATP semis
LONDON -- On an indoor court, Roger Federer can win even when he's not playing his best.
He proved that again Thursday at the ATP finals, beating David Ferrer 6-4, 7-6 (5) and advancing to the semifinals with a group match to spare despite struggling to land his serve and scrambling to stay in the long rallies.
"I've been very successful over the years. Probably won most titles indoors, maybe more than all the other guys combined," said Federer, who called it a natural surface ...
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