YOU SAID:

The first time the team had played a match was when they won a World Cup

INTO JAPANESE

そのチームが初めて試合をしたのはワールドカップで優勝した時だった

BACK INTO ENGLISH

The first time the team played was when they won the World Cup.

INTO JAPANESE

チームが初めてプレーしたのはワールドカップで優勝した時だった。

BACK INTO ENGLISH

The first time the team played was when they won the World Cup.