I'll tell you guys something there's no way Federer would put up an actual racket of his own because the actual racket he uses is not the one you can buy in the shops. I know this because I know the guy who was given your auction racket to string up and hit with to make it look used. Sorry to be the bearer of bad news hope you didn't pay too much.
To the poster of the above---How very, very sad. Were you trying to be funny or are you just a horse's arse?
Oh, and to Fabfed--thanks for sharing--very nice pick up.