Novak Djokovic isn’t sure that Andy Murray’s new coach, eight-time Grand Slam champion Ivan Lendl, can make an immediate difference in his student’s play. Lendl joined Murray’s camp at the start of the year at the tournament in Brisbane. Djokovic and Murray will have a rematch of their 2011 Australian Open final in the 2012 semifinals on Friday night.

"I don't notice any significant difference," Djokovic said. "Obviously, he's always been very successful in Australia at the start of the year. He has always been very fit and very committed. He's always been one of the best players in the world. So here we are again playing semifinals of a Grand Slam. That's not a big change. But I'm saying I guess the effect of Lendl being a part of his team can be felt probably in some time to come."