(VIDEO) Tempers boil over for Novak Djokovic as he obliterates two racquets during ATP Finals opener against Holger Rune

Novak Djokovic saw off Holger Rune to begin his ATP Finals campaign on Sunday evening, but it is safe to say at times he was not a happy man as he lost his temper amid the task of the Dane.

Djokovic won 7-6, 6-7, 6-3, but in being sent the distance in the clash by Holger Rune, it was a rare lose it moment for the Serbian tennis king as he obliterated two of his racquets.

Two racquets that lay behind the seat of Djokovic during future changeovers for the rest of the contest. But as ever like when Djokovic takes an medical timeout or faces any sort of adversity, it seems to fire him up and it did so in this case as he took the first points of this year's tournament.

Watch the video below.