A set of eye-popping play from Roger Federer sometimes left Janko Tipsarevic's head spinning like a weather vane whirling in the wind, but for a moment the seventh seed seemed to have Federer right ...
When are you lucky, and when are you just too good? The 2011 U.S. Open semifinal between Novak Djokovic and Roger Federer set off a debate on the subject that would rage for months—if it ever ended.
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