World Cup concussion subs: Protocols and rules affecting head injuries in Qatar

Teams at the Qatar World Cup will be able to make an extra substitution if a player ‘has suffered or is suspected to have suffered’ a concussion.

Each side is typically allowed five substitutions in a game at the tournament, however there are exceptions.

FOLLOW LIVE: England face Iran to kickstart Qatar World Cup campaign

An additional change is permitted if a match enters extra time in the knockout stages, or if a player is believed to have sustained a concussion.

Only one concussion-related substitution is allowed per team, however, and the opposing side is to be granted their own extra subtitution in such instances – so as to avoid any advantage being gained.

Medical staff are also able to review concussion-related incidents on video in order to provide the appropriate treatement to the player in question.

In England’s Group B opener in Qatar, Iran goalkeeper Alireza Beiranvand was substituted on 10 minutes after a clash of heads with his own defender.

Beiranvand had tried to continue playing after the incident but ultimately left the pitch on a stretcher, as he was replaced by Hossein Hosseini.

Iran were then left with five more possible substitutions in the group game, per the concussion protocol.