“I honestly think it’s going to be quite exciting to see how much longer can they go.
“How much more can they win? They might have some more incredible years ahead of them. That’s my assumption.
“It’s a bit of a golden time for tennis right now, no doubt.”
Meanwhile, Federer thinks it could take him a few matches to get up to speed at the Australian Open which offers Krajinovic a glimmer of hope.
He explained: Yeah, look, I just haven’t played proper matches in many, many weeks, and a lot of guys, probably 95% of the guys are coming here with matches. So I’m not one of those guys. Now I have one. Best of five, too, which is even better.
source: express.co.uk