A concussion substitutions trial has been approved for January in the wake of David Luiz and Raul Jimenez's nasty clash of heads last month.
Football's lawmaking body IFAB announced on Wednesday the planned trials were approved after "less than a year of detailed consultation with relevant stakeholders, medical concussion experts, team doctors, player representatives, coaches, competition organisers, refereeing and Laws of the Game experts".
Under the proposed protocols, players with an actual or suspected concussion will be "permanently removed from the match to protect their welfare", with the team allowed to bring on a replacement.
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IFAB hopes the approach will reduce the risk of players sustaining multiple head injuries in a single match while also ensuring that teams are not put at a disadvantage should a player be told to leave the pitch.