Murray works to end 'misery' tag

Tim Henman says the British No 1 must address his temperament (AP)

Andy Murray recognises that he needs to improve his on-court demeanour after being branded a "miserable git" by Tim Henman.

Henman recently said his successor as British No 1 must address his temperament if he is to have any hope of winning Wimbledon. The 21-year-old acknowledges he can appear morose and that flashes of immaturity are unacceptable, but believes he is making progress.

"Off the court I'm pretty happy," Murray said. "But on the court for sure I could be more bubbly, if that's what everybody thinks. I've watched matches of myself and sometimes I think the way I act on court is great, and at other times I don't like it. Sometimes I'm immature on court and that's not really acceptable. I'm working on it."

* Former world No 1 Lindsay Davenport has pulled out of the French Open, which begins on Sunday, because of personal reasons.