Murray, who secured his first Grand Slam in the US Open final this year, is "playing better than ever," according to Djokovic.
"Murray, I think, is playing better than ever. He won his first Grand Slam title. I'm sure that he's one that's going to be, in the future, one of the contenders to win every Grand Slam he plays in," the Serbian told reporters.
Murray is currently ranked at number three in the world.