A game
noun [ C usually singular ] uk/ˈeɪ ˌɡeɪm/ us/ˈeɪ ˌɡeɪm/
sb's A game 最佳状态
the best performance that someone is able to produce
No one in the team, including myself, brought their A game to any of the matches. 包括我在内，全队没有人在比赛中发挥到最佳状态。
I needed to have my A game today but it wasn't even close. 今天我需要发挥到最佳状态，但是事实上差太远了。
Federer was on his A game and Murray did well to handle him. 费德勒打出了他的最高水平，而穆雷应对得很好。