haha you know what it actually looks like it, but hes wearing yonex shorts...maby he traded shirts with a player whos sponsored by black knight at some tournament or training camp or something or he has some for himself. i dont know the symbol is blured though so cant be 100% sure.
This is common.. ive seen our malaysian players do that to each other. I also saw the Danes do it to their ladies players and vice versa. Yes.. its ouch!