to fight a single match

warfare involving physical combat instead of weapons / (figuratively) activity involving large amounts of physical contact, especially sports

regular game, regular season

psychological warfare

a contest (for a trophy, a title, etc...)

(historical) battleaxe, poleaxe

battle of the brains

(sports) a game/match between teams from Waseda University and Keio University

(collective, chiefly in compounds) many or all battles

final (match or game to decide the champion of a tournament)