As long as I feel like I can win majors and contend, I'll continue to play.
Tennis obviously isn't as popular as baseball in the States.
After I went through two years of not winning an event, what kept me going was winning one more major. Once I won that last U.S. Open, I spent the next six months trying to figure out what was next. Slowly my passion for the sport just vanished. I had nothing left to prove.
With this ranking system, the more you play, the better off you are.
I don't think it really matters, who plays first. Whatever they do, they do.
I want to end my career on my terms, not on what people think I should do.