Roger Federer " Nadal make me better player "

Roger Federer : 

“I don't want to thank him for that, but he made me maybe rework my game and go back to the practice courts and think about what I could change maybe to become a better player,I think for that I'm happy about the losses I took. Took them on the chin and kept moving forward. It's nice at this late stage of the career that we still have these matches going on.”