Del Potro beats Federer to reach semis in London
LONDON -- Juan Martin del Potro is getting the better of Roger Federer again, in a way that no player had managed in a decade.
To end the season with a title, though, he might have to get past the Swiss great again in just two days.
Using his hard serve and booming forehand, Del Potro earned the last spot in the semifinals of the ATP finals Saturday by overcoming the already-qualified Federer 7-6 (3), 4-6, 6-3 in their last round-robin match. Del Potro will face Novak Djokovic in ...
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