2015 ATP World Tour Finals Results: Saturday Tennis Scores and Updated Schedule | News, Scores,…
Tim Ireland/Associated PressRoger Federer maintained his unbeaten streak in the 2015 ATP World Tour Finals with a 7-5, 6-3 victory over Stan Wawrinka on Saturday, setting up a rematch with Novak Djokovic in the final.Wawrinka and Federer…