Arsenal manager Mikel Arteta wants the Premier League to increase the permitted size of match squads from 20 to 23 players to preserve the "value and mental health of players".
Currently, the Premier League allows clubs to name nine substitutes, with managers able to introduce five of those into a game.
A further substitution is allowed to replace a player with a suspected head injury.
Arteta spoke about the issue of a bigger bench as he addressed the difficulty of leaving summer signing Christian Norgaard out of his match squads.