Novak Djokovic has made a clean sweep of his group-stage matches at the ATP World Tour Finals by beating Richard Gasquet in three sets at the O2 Arena.
The Serb broke in the first game of the match and was serving for it at 5-4 when the Frenchman bit back.
He went on to force a tie-breaker, but the world number two edged it 8-6 for a one-set lead.
Gasquet drew first blood early in the second set and served it out 6-4 to bring about a decider, but his challenge fell apart in the third.
Djokovic raced into a 3-0 lead before Gasquet got a game on the board, and he was ruthless in sealing victory with two hours and 10 minutes on the clock.
The six-time Major champion will face Stanislas Wawrinka in the semi-final.
