Novak Djokovic has distanced himself from Andy Murray's comments about drugs use in tennis.
Murray's become the anti doping crusader in the sport, regularly calling for more drugs testing and suggesting at the weekend some of his opponents may have been doping.
His comments prompted an angry response from Djokovic's coach Boris Becker who criticised Murray, saying he's totally out of order.
Djokovic says as long as there is no proof stating otherwise, the game is clean, and it's that simple.
He says it comes down to anti doping agencies who need to come out with proof and as long as they don't they are only rumours.