Novak Djokovic wins ATP World Tour Finals in London . Serbian beats Roger Federer 7-6 7-5 at the O2 Arena . - The U.S. Open is held for the first time since 1927 and will be played on a new grass court surface. Denies Federer a seventh title in the end of season showpiece .
Novak Djokovic wins ATP World Tour Finals in London . Serbian beats Roger Federer 7-6 7-5 at the O2 Arena . World No.1 retrieves breaks of service in both sets . Denies Federer a seventh title in the end of season showpiece .