FIFA's coaching advisers would reportedly propose that teams can use a fourth substitute in extra time before the 2018 World Cup starts.
Gerard Houllier, who is a member of the FIFA technical study group, said that he thinks that introducing a fourth substitute is an idea that they would put to football's rules-making panel.
According to Sport24, currently up to three replacements are allowed, even when knockout matches go to 30 extra minutes after scores are level in regulation time.
Houllier said that changing the rules could see fewer players struggle with muscle problems in high-intensity matches, adding that it is a good idea but only in extra time.
The former France coach said that if someone is injured then why not allow the introduction of a fourth substitute.
So far, substitutes have scored 29 goals after coming off the bench in Brazil, already a World Cup record with eight matches left to play. FIFA said that the previous mark was 23 at the 2006 tournament in Germany.
Houllier said that substitutes play such an important part because they come with a freshness and attitude, adding that nearly a quarter of all the goals have been scored in the final 15 minutes of the game.