Halle - Rafael Nadal leapt to the defence of embattled Andy Murray on Thursday after the British star was accused of faking injuries on court.
German veteran Tommy Haas said world No 4 Murray exaggerates the effects of injuries in a bid to change the momentum of matches if he isn't playing well.
His comments came just days after former Wimbledon women's champion Virginia Wade described Murray as a "drama queen" when he suffered a back injury but recovered quickly to beat Jarkko Nieminen at the French Open.
"Andy is a great guy. In my opinion he never does this to bother the opponent. So, that's the most important thing. It's difficult to explain but I really believe in Andy," said world No 2 Nadal.
"I think he's a fair guy, a good competitor. I'm 100-percent sure that he was doing nothing to bother the opponent, to take advantage."
Nadal on Thursday made a winning return to grass courts, defeating Slovakia's Lukas Lacko 7-5, 6-1 in the second round of the Halle ATP tournament.