With the Premier League set to introduce five substitutions from next season, the new rule could have a major impact on Leeds United should the Whites stay in the division. Jesse Marsch's side currently sit eight points clear of the relegation zone following Saturday's 1-1 draw against Southampton and are now set to be part of the 2022/23 top-flight campaign.
In a statement on Thursday, the Premier League said: "The Premier League Shareholders met today and discussed a range of matters. Clubs agreed to change the rules relating to substitute players.
"From next season, clubs will be permitted to use five substitutions, to be made on three occasions during a match, with an additional opportunity at half-time. A total of nine substitutes can be named on the team sheet."