hi, i was wondering if you can refuse a let in a game where there are no umpires nor line judges (school VS school - Private Schools Association sport to be exact). lets say there is this short kid called Robin, his shot landed in the back corner (singles court). his opponent called it out and Robin goes "oohhh? [suprised/disgusted/annoying look] thats in !!!!?!!!!" and his opponent goes "no, thats out" and he goes "what?! replay!" and his opponent is reluctant to replay it. so does his opponent have any right to refuse a let or a replay? note that Robin might just be an immature player who needs to cheat to win and also does that a couple of times (including in the following doubles game). so what can opponents of Robin avoid having to replay? yes some things are being mentally strong and continuosly refuse the let, being completely happy-go-lucky and agree to the let, being intimidated by Robin's disgusting look and behaviour and agreeing to the let, call an official coach who is watching a different game at the moment, going to Robin's side and warning him if he ever tries that trick again he nose would be broken. any others? any suggestions would be most appreciated. p.s. the name Robin in this post and any other similarities with real life people and situations is unintended. well, actually it is inteded. im not completely sure if that kid's name is Robin or not, but i know i hate people like that who pretend to look "disgusted" and ask for a replay everytime they played a stupid bad shot.