Australian Open 2012: Rafael Nadal buoyant ahead of Novak Djokovic clash Over the past year, Novak Djokovic has become Nadal's nemesis, with six consecutive victories. When they meet in Sunday's Australian Open final, Djokovic will start as the favourite to extend that run. "I played not very well in the second half of 2011," said Nadal, after he had ousted Roger Federer in four sets on Thursday. Now I am working on a few things. When I am able to play inside [the court], to play aggressive, I think things are fantastic. [But] I don't know if it's going to be enough against Novak. But then, as Murray said, Djokovic can be even more dangerous when he is suffering physically. "If he is tired, he's still hitting the ball so cleanly," Murray said. He's going for shots and making them, shortening the points. When asked if he found Djokovic's theatrical displays of exhaustion annoying, Murray was diplomatic, saying: "I'm sure he is struggling. I don't look at him and think, "he's being an idiot," I just know he's going to be fine in a few minutes. So you don't lose concentration over it. But he did admit that "I feel like if it was me I would be getting criticised a lot for doing what he does. People would say "Andy's play-acting."" Djokovic was philosophical about the disadvantage of playing in the second semi-final. "There is no secret that it [the final] is going to be physical again," he said. I will do my best to recover. I have a day and a half. I will get my recovery programme under way and hope for the best.