Roger Federer is looking forward to meet a familiar opponent in Tomas Berdych after continuing his Australian Open title defence with another straight-sets win in the fourth round.

“I’m looking forward to playing against him. He seems to be in good shape and I’m happy he’s over his back issues that he also had at the end of last year. That’s a good thing.”

“We have had some good ones over the years going back all the way to the Olympic Games in Athens in 2004,” Federer said of his previous battles with Berdych.