It doesn't matter what you shout. But why are you yelling? I want to explain. It is conceivable that athletes are nervous when they participate in this kind of competition. So many viewers. . . . Once you miss, the consequences are unimaginable. Therefore, in order to cheer themselves up and increase the momentum of playing, athletes will shout loudly and make a hullabaloo about after winning.
This kind of crying not only shows that he is in a good state (when he is in a bad state, he sweats when he shouts), but also gives himself confidence. Beat your opponent at the same time. In short, the shouting words are different for everyone, which can be "Sa", "Ha" [:)], "Sa Se" or "Mo" in Korea, or "Yeah!" If you like. Of course, you can shout in your heart instead of shouting.