What's Wrong with Taking an Olympic Champion to a World Cup?

If you were reborn as the national football coach, which player would you choose? The strongest national football team in 2002? Or a top legendary cross-border athlete? The protagonist Jia Yinsheng activates the football coaching system after traveling through time, and accidentally forms a football team that has never played football. The team members include basketball, table tennis, badminton, boxing, weightlifting, etc. But there are no football players. Jia Yinsheng won the Hercules Cup step by step with the top talents of this legendary athlete and a powerful system.