Seigaku winning this match depends on the effects of "impressions" whatever that is though It's kinda obvious that it'll make them laugh their asses off, or maybe freak them out. Although I cant see them winning this match. It would mean that either Kawamura or the Inui/Tezuka pair will lose, cause' I dont see Kintarou's match against Echizen in a second plane of importance because of Seigaku already winning 3-1. Then again them loosing this match would be a little anticlimatic, they are really fired up because they're trying to avenge their sempai's loss. Also I can't see Kawamura loosing, the person that he strived for was Ishida Jin's brother and he utterly destroyed him. Winning against Ishida would mean that he's the top power player in the nationals and that's his dream before quitting. So that leaves Tezuka and Inui in the crossfire, I don't think that they have an actual reason for winning except for Tezuka being a super kickass player. Not a very picturesque scene Seiguku's captain loosing as well as Seigaku's genius.