Novak Djokovic is cruising high at Wimbledon.

The three-time champion reached the fourth round for the 10th time on Saturday with a 6-4, 6-1, 7-6 (7/2) win over Ernests Gulbis of Latvia.

Second seed, Djokovic will play France's Adrian Mannarino for a place in the quarter-finals

"I'm delighted with the performance today. I thought I raised the level of tennis," said Djokovic after making the second week without dropping a set.

"Comparing to the first couple of matches and the last couple of weeks I think this was the most focused I was on the court."

Gulbis, now ranked at a lowly 589 after once reaching 10 in the world in 2014 when he defeated Roger Federer on his way to the French Open semi-finals, fired 37 unforced errors to Djokovic's meagre 12.

"It's not easy obviously playing on grass against a big server like that," said Djokovic of his childhood friend Gulbis.

"I'm very pleased with the way I've felt, the way I've played."