Novak Djokovic loses 7-6 ( 2 ) , 6-3 to Janko Tipsarevic in Madrid . Both players were unbeaten on clay coming into the match , but Williams extended her winning streak over the Russian to seven while winning her 10th straight match . - The US Open is won by Roger Federer over Rafael Nadal in straight sets. Nadal said he would also boycott the event after his loss a day earlier . Roger Federer , Serena Williams and Victoria Azarenka all through to semifinals .
Novak Djokovic loses 7-6 ( 2 ) , 6-3 to Janko Tipsarevic in Madrid . - The US Open is won by Roger Federer over Rafael Nadal in straight sets. Nadal said he would also boycott the event after his loss a day earlier . Roger Federer , Serena Williams and Victoria Azarenka all through to semifinals .