So I played my friend yesterday. He had beat me and straight sets the time before that. So I got my sweet redemption by beating him 6-2 7-6(8-6) but one thing bugs me very bad. He was up 4-1 in the 2nd set and I climbed way back. I was serving 5-4 for the match. He breaks me. 5 all. I break him. I'm serving again. He breaks me. I finally squeak it out in a tie break. Had I not won the 2nd set I would have lost I think. Best of 3 only. Why am I able to perform when I'm down and am able to be clutch then, but when I'm closing it out I crumble? My forehand backhand and serve have all been fine for months so its not a technical issue. In fact I was so on it was scary. Hit the line in the oppisite corners 4 straight times one rally. Made him sprint his fastest back and forth. Yet even with my surprisingly stellar play, I fold like that? Its gotta be mental. Any tips how to change that?