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ap_photo In this Sept. 3, 2007 file photo, Roger Federer, of Switzerland serves to Feliciano Lopez, of Spain, during their match at the US Open tennis tourna - Foto

In this Sept. 3, 2007 file photo, Roger Federer, of Switzerland serves to Feliciano Lopez, of Spain, during their match at the US Open tennis tourna

In this Sept. 3, 2007 file photo, Roger Federer, of Switzerland serves to Feliciano Lopez, of Spain, during their match at the US Open tennis tourna - Dienstag 8. Juli 2008, 16:14 Uhr
In this Sept.