World No. 2 Novak Djokovic recovered from losing a tense first set to defeat Dominic Thiem 6-7, 6-0, 6-2 on Sunday at the Barclays ATP World Tour Finals in London.
Djokovic survived three set points in the 76-minute first set before Thiem ripped a forehand winner. An angry Djokovic reacted to dropping the set by hitting a ball toward coaches Boris Becker and Marian Vajda in the crowd.