What have you done to your opponents during matches? Mainly in doubles i actually have hit people. Once, this guy hit a really bad juicy return off my partner's second serve. It was coming right at me, and i decided to let it bounce then overhead it. The resulting overhead nearly caused the returner's partner his ******* and testicles: he was doubled over for about 20 minutes. Also this one time i hit my own partner with a shank flat serve. Nothing major but it did smack him on his arm and cause him to drop his racquet.