Novak Djokovic has said that he believes he is now a much more complete player.
The world number one feels that his fantastic form is down to his improvements as a player, which he says is a source of confidence.
"I'm a more complete player," Djokovic told Eurosport.
"I feel that I know what to do on the court, this is something that gives me a lot of confidence.
"I carry that confidence from tournament to tournament."
The 24-year-old is the reigning Wimbledon champion.