いち かい勝負 しょうぶじゃなかったです
ichikai shōbujanakattadesu

Noun
Desu Copula

The polite, past negative form of 一回勝負

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

Past/Perfective
Negative
Polite
Casual Register