I think most players would love, at one stage in their career, to say, 'I've been No. 1 in the world.
I've been asked a lot lately if tennis is clean or not. I don't know any more how you judge whether a sport is clean. If one in 100 players is doping, in my eyes that isn't a clean sport.
You have to go into each match believing you can beat all of the players.
If you want a player to serve and volley more, you need to teach them to do that more, how to move at the net.
For me the most important thing has always been tennis, and that's what I want to get across the image I want to portray is a hard-working tennis player.
This will be my first Grand Slam final without Roger Federer or Novak Djokovic on the other side of the net, but I don't think being the more experienced player will make much difference to my approach.