World number one Novak Djokovic overcame the loss of his first set of the tournament to advance to the French Open quarter-finals with a 4-6 6-3 6-4 6-4 victory over 16th seed Philipp Kohlschreiber on Monday. Djokovic got off to a sluggish opening as German Kohlschreiber started out by firing on all cylinders. The Serbian top seed,however,was quickly back in control,breaking early in each set and saving a few break points on the way to a somewhat uneventful victory. Djokovic next faces German Tommy Haas,the 12th seed,for a place in the semi-finals as he bids to land the trophy at Roland Garros for the first time. Speaking in French to a courtside interviewer,Djokovic said: "It was tough for me today against an opponent who has the qualities to play well on clay. "After the first set I played well. I'm satisfied." Djokovic,who ended Rafa Nadal's eight-year reign on Monte Carlo clay last month,was broken in the fifth game as he became unsettled by Kohlschreiber's crosscourt backhand. The German held firm,saving a break point with a forehand winner down the line before sealing the opening set with a sliced backhand that clipped the net. Djokovic then found his range and despite his best efforts and a few exquisite drop shots,Kohlschreiber could not disrupt the six-times grand slam champion. The 16th seed threatened with a few break points but Djokovic remained focused and saw them off with relative ease. Kohlschreiber cancelled out one of two breaks in the fourth set and saved a match point with yet another crosscourt pass. Djokovic then drilled a forehand winner to go through after producing some solid tennis.
