I don't get as nervous now as I used to. Last year, I remember when I played my first singles match, I went out to warm up and I could barely hit a ball over during the warmup because I was so nervous. I still won the match, but I played horribly because I was terribly nervous the entire team.
Now, I rarely get nervous. About a week and a half ago I was up 7-3, and I had a couple match points in that game before the kid came all the way back to 7-7 before I finally won 9-7. I don't think this was really nerves as much as I just couldn't quite close it out.