'I had felt great the day before and then awful the next day. And this is really when I said, 'Okay, something is wrong. I have to totally check things out here'.'

FEDERER IN JANUARY

"The doctors said I must have had it for at least six weeks. When I heard it was mono, I was actually even more happy to have made the semi-finals of the Australian Open, because probably a doctor would have said, 'You can't play'.'

FEDERER NOW

"They weren't sure I was over it, but now I'm creating antibodies and this really shows you are over it. But I lost a lot of fitness.'