Andy Murray insists he still has a good relationship with Novak Djokovic despite their opposing views on doping.

The world number two believes there should be more testing in the sport while his Serbian rival insists the game is clean until proven otherwise.

"I think it all comes down to anti-doping agencies, governing bodies; they need to come out with proof, if they don't it's only rumours," Djokovic said last week.

He was responding to Murray's comments earlier in the month when the Scot spoke of his suspicion of some of his fellow professionals. He also said more had to be done to ensure the anti-doping process is better funded and implicated.

Despite the disagreement, however, Murray says there is no bad feeling between the pair.

"I've spoken to Boris [Becker] and Novak and we're all good," he said. "I'm practising with Novak next week in Madrid.

"It's a topic that's always difficult for athletes to discuss these days but we have to try and do our best to maintain a clean a sport as possible.

"All I want is to try and make sure tennis is as clean a sport as possible, it's very difficult to keep a sport that way these days.

"The interview that I gave, I've seen the full transcript of what I said and I think it was a fair thing to say. There have been a few issues in tennis over the 10-12 years I've been on the tour."

Earlier this week the founding president of the World Anti-Doping Agency, Dick Pound, criticised Novak Djokovic's "Lance Armstrong approach."

Tennis was recently rocked by a drugs ban for Maria Sharapova, who tested positive for the newly prohibited substance Meldonium.