Roger Federer fires Rafael Nadal and Novak Djokovic warning at Australian Open

And Federer extended his sympathies to Krajinovic in his press conference.

He added: “Maybe little bit down the stretch. But first I’ve got to get there. I also think maybe for me the first two rounds ended up playing out good, with Steve Johnson playing a similar game to me, but having less options I guess at the end of the day. Then also Krajinovic today also was a bit tired.

“Also when I do play well against him, I can control things pretty well.

“I feel if I play tactically well, and I’m very strict on how I need to play, this can happen.”

source: express.co.uk