I can definitely say the same thing [discussing Steffi Graf's claim that she had played against at least one top player who used steroids]. Steroids can really make a difference, physically and mentally. I'd be really disappointed if I had been ranked No. 2 behind someone who took steroids.

I think team sports probably teach you more about giving - about being unselfish and being flexible.

I was labeled at a young age - Miss Unemotional, Miss Cool, and that would carry over to my press conferences.

Ninety percent of my game is mental. It's my concentration that has gotten me this far. I won't even call a friend on the day of a match. I'm scared of disrupting my concentration. I don't allow any competition with tennis.

Don’t let a first-set victory lead into a second-set slump

If you're a champion, you have to have it in your heart.

Ninety percent of my game is mental. It's my concentration that has gotten me this far.