'Honestly, I got a little bit lucky': Dominic Thiem's relief at overcoming Djokovic - video

Dominic Thiem expressed his relief after overcoming world No 1, Novak Djokovic, to progress to the concluding Sunday of the ATP World Tour Finals. Thiem laboured for nearly three hours in a gritty but flawed win as Djokovic saved four match points in the second set and led 4-0 in the third-set tie-break before the Austrian found a way through. Dominic Thiem topples Novak Djokovic at ATP World Tour Finals