There is no doubt about how hard it is to stay on top in any sport, but to do it in an individual sport for the majority of your career, it is not easy.

People know me. I'm not going to produce any cartwheels out there. I'm not going to belong on Comedy Central. I'll always be a tennis player, not a celebrity.

Once the fifth set comes, it's a matter of nerves.

With this ranking system, the more you play, the better off you are.

Tennis is seen all around the world; if I am home or anywhere in the country, United States, people will stare.

Once the US Open is over in the States, mainstream America doesn't really follow tennis, unless you are a true tennis fan.

I want to end my career on my terms, not on what people think I should do.