Ninety Percent Of My Game Is Mental.

You Can't Give Up! If You Give Up, You're Like Everybody Else.

You Pay A Price For Everything In Life.

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.

Being Famous Before You've Formed Your Personality, Before You Have That Self-esteem, Is Dangerous.

In Tennis, At The End Of The Day You're A Winner Or A Loser. You Know Exactly Where You Stand... I Don't Need That Anymore. I Don't Need My Happiness, My Well-being, To Be Based On Winning And Losing.