Federer next played at his eleventh ATP World Tour Finals, where he was the two-time defending champion. He was drawn into Group B, which included David Ferrer of Spain, Juan Martín del Potro of Argentina, and Janko Tipsarević of Serbia. He first faced Tipsarević, and dropped only eight points on serve en route to defeating him in straight sets in an hour and nine minutes. With his win over Tipsarević, Federer recorded his fortieth ATP World Tour Finals win, surpassing Ivan Lendl's record of ATP World Tour Finals win. Federer then played Ferrer, and beat him in a tight second-set tiebreak after Federer clinched the first set on a break of Ferrer's serve. Federer's win marked his fourteenth consecutive win over Ferrer and also qualified him for the semifinals. Federer played del Potro to wrap up the round robin, and found himself one set down after del Potro clinched a first-set tiebreak. Federer broke del Potro early in the second set, and held the lead to level the match at one set all. However, del Potro responded by breaking him early in the third set, and Federer's unforced errors ultimately cost him the game and the match. Federer's loss meant that his streak of 12 matches won at the ATP World Tour Finals was broken. Even with the loss, Federer finished first in the group, and advanced to the semifinals, where he faced Andy Murray, who he had last played at the Shanghai Rolex Masters. Murray started out strong, breaking Federer in the first game of the set, but Federer recovered by breaking Murray later in the set. The first set eventually went to a tiebreak, and Federer found himself with two set points, converting the second to take a one-set lead. Federer then flew through the second set, breaking Murray twice en route to winning the match in just over an hour and a half. With his win, Federer advanced to his eighth final, where he played Novak Djokovic. Federer held an early lead in the first set, but Djokovic managed to level the set and ended up pulling out to a one-set lead after winning a very tight first-set tiebreak. In the second set, Djokovic was able to convert a decisive break point on Federer's serve late in the set and he subsequently served out the match to win his second end of season championship. The loss denied Federer a chance to tie Ivan Lendl's record of three consecutive ATP World Tour Finals titles. Federer's loss also cost him a chance at tying John McEnroe's record of 77 career titles won.
