To meet my goals, I couldn't let up when I was playing tennis.

She was not fit at all.

What they remember you by is how many Grand Slams you win,

She's had a frustrating year physically. It's amazing that she won the Australian Open in this shape.

In Toronto, Serena Williams was not fit at all, not striking the ball well at all, and went three sets with someone (ranked) 92 in the world,

Kim is playing the best tennis right now coming into the U.S. Open.