Novak Djokovic's impersonations of Maria Sharapova, Rafael Nadal and a few others continue to be a crowd favorite, but his peers are growing a little tired of his act.
Roger Federer doesn't completely embrace the impersonations as 'good fun.'
"I know some guys weren't happy. Some guys might think it's funny -- he's walking a tightrope, for sure,"Sharapova takes it in stride and would like the opportunity to throw it back at him.
He was back at it again after his first round Australian Open victory doing his Sharapova schtick (above). Still funny, but growing a little old. Novak will need a few new tricks come the US Open."We'd need a really long time because all I'll need is a tennis ball and I'm just going to stand here and bounce the ball for a really long time before I serve. We're going to be here all day long."
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