Premier League and FIFA backing right away from this.The Premier League has already ruled out being part of the initial roll-out of any trial, while football's world governing body Fifa said "reports of the so-called 'blue card' at elite levels of football are incorrect and premature".
It added: "Any such trials, if implemented, should be limited to testing in a responsible manner at lower levels, a position that Fifa intends to reiterate when this agenda item is discussed at the Ifab AGM [annual general meeting] on 1 March."