at\ ---\ stage\ of\ the\ game

at\ ---\ stage\ of\ the\ game
adv. phr.
At (some) time during an activity; at (some) point.

At that stage of the game, our team was doing so poorly that we were ready to give up.

It's hard to know what will happen at this stage of the game.

At what stage of the game did the man leave?

Словарь американских идиом. — СПб., Изд-во "Лань". . 1997.