INDIAN WELLS, CALIFORNIA (AFP) - World No. 1 Novak Djokovic survived a rocky start to beat Gregor Dimitrov 7-6 (7/4), 6-1 on Tuesday and reach the fourth round of the Indian Wells ATP Masters.

Djokovic trailed 4-1 in the opening set, but a welter of errors from his 21-year-old Bulgarian opponent was all the opportunity the Serbian star needed and he battled back to win in 67 minutes.

Djokovic improved to 15-0 in 2013 and 20-0 since October 31 - when he lost to American Sam Querrey in the Paris Masters.

He'll get a chance to avenge that defeat in a fourth-round meeting with Querrey, who edged Australian Marinko Matosevic 7-6 (7/5), 6-7 (7/9), 7-5.