Okay, yesterday I had one of the worst matches of my life. I am an NTRP rated 5.0, and I lost yesterday to someone who is between a 3.5 and a 4.0. I am in a league and sometimes we have to play way down. Anyways, I have played this guy twice before and never lost more than a game or two in the six sets we have played. We start and I get off really slow, down 4-0 within five minutes on probably 12 unforced errors. I was playing fine from the baseline, but as soon as I hit an approach, I was either missing badly (and I wasn't really going for that much) or completely mistiming the ball and my approach was barely reaching the service line. I came back to win the first, 7-6, then in the second lost two points on my serve all set (until the tiebreaker), but never broke him, and ended up losing 7-6. For the third set, we just played a tiebreaker, which I lost. Here is the problem: this guy hit nothing but slice and was the consummate pusher---everything came back, but he couldn't really help me. However, with my strokes being as far off as they were (worst I have played in probably 2-3 years) I couldn't finish. So I started hitting just like him, not making errors, but in effect, leveling the playing field for him. What should/could I have done in this situation?