World number one Novak Djokovic has revealed that he is pleased with the way that he has played so far at Wimbledon this year.
The Serbian is yet to drop a set in any of his matches at SW19, the latest of which saw him overcome Tommy Haas thanks to a 6-1 6-4 7-6 victory last night.
"It's been a great performance for me so far. I've been playing really well as the tournament is going by," he told BBC Sport.
"Last night I had Tommy Haas who I had never won against on this surface but came up with a top game when I needed to.
"I got a lot of returns back and I was serving efficiently which helps me be aggressive."
He will take on Tomas Berdych for a place in the semi-finals.
