《card games》ace
《sports》ace (of a team); leading player; ace pitcher (in baseball)
ace; hotshot; top dog; top hand; wunderkind
《sports》ace (serve)
彼はチームのエースだ。
He is the team's ace.
エースが怪我で欠場した。
The ace was absent due to injury.
新人がエースに抜擢されてチームが活気づいた。
The team was energized when a newcomer was promoted to ace.