Andy Murray believes he has an extremely difficult draw at the Australian Open. The two-time Grand Slam champion has reached the final in Melbourne three times, but after back surgery in late 2013, struggled to reach his top level last season. Murray played better in the latter part of 2014, but he was crushed by Roger Federer, 6-0, 6-1, at the ATP World Tour Finals.

To begin 2015, Murray played an exhibition tournament and beat Rafael Nadal, 6-2, 6-0.

The world No. 6 could face Martin Klizan in the third round, No. 10-ranked Grigor Dimitrov in the fourth round, and possibly Federer in the quarterfinals or Nadal in the semifinals.

"Obviously very tough draw. Very difficult draw," Murray said. "It's very hard to comment on it. If you have to play all of those players, obviously it's going to be extremely difficult to come through that. I'm aware of that. That's fine. But often in these events, there are upsets. And then you just have to wait and see who you're playing in each round because it doesn't always work out as simply as that."