I don’t see a problem with playing music before a tennis match. I know people have a personal preference on sport culture and whether music can be played before a tennis match or if it would be better to keep it in the locker room. I don’t watch tennis very often, but I don’t usually see tennis players with headphones on before a match. I don’t know if it’s because I don’t watch the sport very often or if it’s because it’s played during warm ups. The sport’s culture is changing, and differences in opinion will change with it.