PARIS: Fourth seed Novak Djokovic of Serbia crashed out of the French Open on Saturday losing a third round tie 6-4, 6-4, 6-4 to Philipp Kohlschreiber of Germany.

Kohlschreiber will play Tommy Robredo for a place in the quarter-finals after the Spaniard's 4-6, 7-5, 6-1, 6-0 over Maximo Gonzalez of Argentina.

It was the biggest upset to date in the tournament as Djokovic had been touted as being possibly the main threat to top seed and defending champion Rafael Nadal after taking him to the limit in Madrid two weeks ago.

But against the 25-year-old 29th seed, who was playing for the first time in the third round at Roland Garros after a five-set win over 2003 champion Juan Carlos Ferrero, he met his match despite breaking first in the fourth game.

From 1-4 up, the wheels came off for the 2008 Australian Open champion as Kohlschreiber ran off five games in a row to go a set up.

It was much the same story in the second set as Djokovic won the first game but then allowed the German to dominate proceedings taking another five games in a row.

Two sets up and there was no way back for a flat-looking Djokovic.

Kohlschreiber grabbed the break of serve he needed in the ninth game with a stunning backhand passing shot down the line and he easily served out for the biggest win of his career.

Djokovic said that he had no excuses for the loss which he described as "just a bad day at the office."

"I was disappointed with the way I was performing. I couldn't find the rhythm throughout the whole match," he said. "I was trying to find the comfort zone but my legs were really stuck."

"I was trying not to be frustrated with my unforced errors and trying to stay positive and wait for my chances, but he didn't give me any.

"He played tactically really smart and I had no solutions.

"But as I said before, the opening rounds are very dangerous because the players are lower ranked and they have nothing to lose.