いち かい勝負 しょうぶじゃありませんでした
ichikai shōbujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 一回勝負

1. It wasn't a one-time thing.; It wasn't a single battle.; It wasn't a one-off.

Past/Perfective
Negative
Polite
Terminal Form