http://www.skysports.com/football/n...green-card-in-conifa-world-football-cup-match This is a good idea. A player who commits an offence the referee deems as worse than a yellow, but not as bad as a red, will get a green card. This means he will be sent off, but a substitute is allowed to replace him and the player will not serve a further match suspension.
I really like the hockey system of cards: https://www.investechockeyacademy.com/defining-penalty-cards-red-yellow-green/ It uses a sin bin and the times are up to the discretion of the umpires.
Surely this gives a defender the option of putting in a reckless and/or dangerous challenge in the last few minutes with virtually no consequences to him or his team.
So instead of endless debates about what is a red or yellow card we will now have an extra card thrown into the mix!
