Fourth extra-time substitute for later stages of FA Cup

It follows in the footsteps of the Copa America, who also trialled the extra substitution in the final of this summer's tournament.

Teams will be allowed to make a fourth substitution during extra-time in the final three rounds of next season's FA Cup in Britain.

The Football Association is trialling a new format, subject to approval from the game's law-makers the International Football Association Board (IFAB), which will see teams who have made all three changes during the 90 minutes of a quarter-final, semi-final or final permitted one extra during the additional period.