noun
opponent's court; opponent's side of the court
Used in sports such as tennis, badminton, and volleyball to refer to the side of the court belonging to the opposing player or team.
See also: 相手
彼は相手コートの奥にスマッシュを決めた。
He smashed the ball deep into the opponent's court.
相手コートにボールを返すのがやっとだった。
I barely managed to return the ball to the opponent's side of the court.