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FLUSHING MEADOWS, NY - AUGUST 28: Roger Federer of Switzerland returns to Lars Burgsmuller of Germany during their first round match at the 2001 US Open at Flushing Meadows, New York 28 August 2001. Federer defeated Burgsmuller 6-4, 6-4, 6-4. (Photo credit should read MATT CAMPBELL/AFP via Getty Images)

FLUSHING MEADOWS, NY - AUGUST 28:  Roger Federer of Switzerland returns to Lars Burgsmuller of Germany during their first round match at the 2001 US Open at Flushing Meadows, New York 28 August 2001.  Federer defeated Burgsmuller 6-4, 6-4, 6-4.  (Photo credit should read MATT CAMPBELL/AFP via Getty Images)