cheater

I just played a finals today, score was 6-3, 3-6, 0-1 (6-10). Obviously, all is said and done now, but what to do if someone is blatantly cheating? TL;DR of match: won first set, literally no shady calls, just one really close call, but easily discussed and reached an agreement to replay point...

I might have to play against a moonballer that also cheats, he purposely calls lots of IN close bounces OUT. Also, he asks to check the bounce mark lots of times in his shots that were obviously out. Everyone hates him in the club we play. Everyone. I have yet to see a single guy who says "Mr X...