dude. get a crazy friend of yours with a car to go ROAD TRIP on this! cmon. you gotta find someone.
anyways, he's a wrestler/boxer, and from my crappy and inexperienced standpoint, i can say:
- striking wise, fight him from far range. use your front push kick/footjab/teep from a distance to his gut. he won't kick much, if at all, and might not have good kick defense, so use those legkicks if they are allowed. also, make sure you can circle around him when kicking from a distance. you don't want him checking a kick just to get in close and smack you with a powershot, then grabbing you and taking you down. be technical, hit, if you see an opening to follow up, hit again, if not, retreat, circle, repeat. if you know how to fake a kick, go ahead. fake one leg, follow up with a back kick, or a head kick coming from the other side. just get creative with shots he will not expect, but don't get slappy-kick happy. kick him low, he lowers his guard, punch him in the head. good luck.
- don't try anything funny when you clinch. he's a wrestler, and his clinch will probably be far superior to yours, so just focus on not getting taken down. you can't use knees, so try to get him against the ropes/wall/fence/whatever and work from there. if you try to get offensive and attempt a slam, he will probably own you badly.
- as said, he is probably not comfortable working on his back. he will probably control you very easily on the ground due to his wrestling experience, so try to get up ASAP.
- punch him in the mouth.
- pull his hair.
- call him funny names.