From the itw after the Nieminen match PART II:
Q. Roger's performance without a coach over a good number of months, is that all the more credit to him?
MARAT SAFIN: Credit to whom? To Roger or to Peter?
Q. To Roger.
MARAT SAFIN: Yeah, but -- it's not really right to say that. Of course, I'm not going to defend Peter, you know. But also who brought him there? Who brought Roger Federer to be No. 1 in the world? Is Peter. Without taking any credit from the people around Roger right now, you know, the girlfriend, the mother, all the family, and also his tennis skills, I'm not taking any credit away from him. But to be able to get there, you need to have somebody. And he had somebody for six years. So he had such a good base before he got there. So he's basically playing on a base that Peter Lundgren gave him. And of course it's coming, the talent is coming , the mental toughness and all these things that he has right now. He worked for six years, for six years, yeah.