(勝敗決せぬうちなら)to strive for victory―contest the victory―dispute the victory―(勝敗決してからなら)―claim the victory
to gain a victory―win the day―(一局部の勝ちなら)―gain the advantage
to prevail over the enemy―get the better of one's rival―get the upper hand of one's man―(議論なら)―have the best of it
to predominate―preponderate―over the others