Novak Djokovic wins ATP World Tour Finals in London . Serbian beats Federer , who had beaten home hope Andy Murray in the semifinals , was losing for only the second time in eight final appearances as he chased a hat-trick of titles . 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 . - 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 .