You can be stubborn and successful or you can give it up a bit and change things around. For me it's important to have a bit of both.
Roger FedererWhen I think of the Olympics I only think of good things. I think of what a great event it is and what it has done for me and my career, and changed my personal life, too.
Roger FedererI used to do a lot of video analysis early on, but more for pleasure and looking at my own technique.
Roger Federer