He is on his way to becoming possibly the greatest of all time. But he's still human.

He hasn't changed a bit. He hasn't been arrogant in the locker room. He never is. That's great to see someone that does it with class. He doesn't intentionally…

He put tennis, the bar very high-very high. It's incredible what kind of game he can play.

[In the modern game], you're either a clay court specialist, a grass court specialist or a hard court specialist ... or you're Roger Federer.