Fourth substitutes will be allowed in the FA Cup from this week's replays
Teams will be allowed to bring on a fourth substitute in extra time from the first round of the FA Cup this season, the Football Association has announced.
Last season, a fourth substitute was allowed from the quarter-final stage onward and the idea is part of a two-year trial approved by the game's law-making body, the International Football Association Board, in 2016.
Teams will still select a maximum of seven substitutes and be able to use three of them during normal time.
There are five first-round replays scheduled from Tuesday to Thursday this week, with £18,000 in prize money available to the winners. The second round will be played over the weekend of December 2-3.