Why do you substitute your players in football?

Answer 1

Tactical -A player playing bad or going more attacking or defensive

Injury's A player is injured and cannot play or have a niggly injury and don't want it to get worse as they want to play the next game (normally a big game)

Answer 2

1. Player could be injured.

2. Player is fatigued.

3. Player isn't performing as the coach needs him to.

4. Player is on a yellow card and the coach doesn't want him to get a red card.