Novak Djokovic: I played badly

World number one Novak Djokovic has admitted that he played badly during Sunday's French Open win over Andreas Seppi.

Despite looking down and out after losing the first two sets, the Serbian came back to triumph 4-6 6-7 6-3 7-5 6-3 in the fourth-round tie.

"I played very badly, but I won thanks to my fighting spirit," he told reporters.

Djokovic will face either Jo-Wilfried Tsonga or Stanislas Wawrinka in the quarter-finals.