You have to keep them awake, but I feel it's not easy for a defender to have to concentrate for 90 minutes and you can't afford to make a mistake.

“你必须让他们保持清醒的头脑，但我想要让一个防守球员在90分钟里都高度集中精神和不犯一个错误是很不容易的。”“有人大喊一声或许有时候能对他们有所帮助。”

youdao

You have to keep them awake, but I feel it's not easy for a defender to have to concentrate for 90 minutes and you can't afford to make a mistake.

“你必须让他们保持清醒的头脑，但我想要让一个防守球员在90分钟里都高度集中精神和不犯一个错误是很不容易的。”“有人大喊一声或许有时候能对他们有所帮助。”

youdao