When I'm playing my best, like I was at the U.S. Open, I feel on top of the match and able to do exactly what I want. There are other times when you're not in control, but that is tennis and you have momentum changes in every single match.
I just tried to play aggressive and play the way I like playing... trying to be aggressive and hit the ball hard, try to come into the net whenever I can. She had a couple of winners when she was match point down, she played hard and really gave it her best shot.