eg. hitting to just one player only, yelling when you do a good smash, laughing when your opponent misses, calling an out when it's in, pretending/giving the impression that you are taking it easy (to piss them off or not try), saying mean things (jk)
I don't know if mind games is consider playing dirty or not.. but it seems like badminton is largely a mind game.. and it takes strong minds to not let things like these get to you.
I don't know if mind games is consider playing dirty or not.. but it seems like badminton is largely a mind game.. and it takes strong minds to not let things like these get to you.