Wimbledon: Novak Djokovic stunned by Sam Querrey in third round

The world No 1 fought back to take the third set having started the day two sets down on Saturday.

But Querrey, the No 28 seed, battled to a fourth-set tie-break, in a match that was interrupted by rain on Court No 1, and clinched it 7-5.

"I'm ecstatic, it's the biggest tournament in the world," Querrey said. "I played the break points really well, came up with a big serve, got a couple of losing errors in the tie-break."

On how he felt overnight, he added: "He came out and got the first four games, then we had another rain delay and I was able to regroup.

"He is on the way to being the greatest ever, so I knew he would be mentally tough. I am just going to be happy with this and look forward to the next round a bit."

Djokovic, who confirmed afterwards he would not play in the Davis Cup quarter-final against Britain this month, was gracious in defeat, congratulating his opponent and saying: "Congratulations to Sam. He played a terrific match.He serves very well. I think that part of his game was brutal today. He just overpowered me."

"I had my chances. I just wasn't feeling the ball as well as I wished."

It leaves Andy Murray, the British No 1 and No 2 seed, the favourite for the trophy with Djokovic failing in his attempt to win the Golden Slam (all four majors and the Olympic title) this year.

Querrey will face France's Nicolas Mahut in the fourth round.