Fifa will trial concussion substitutes at next month's Club World Cup in Qatar, football's world governing body said Friday.
The decision comes after the game's rule-making body IFAB gave the go-ahead to additional trials last month.
The trial at the Club World Cup, which will be held from Feb. 1-11, will allow one permanent concussion replacement in cases of head injury, regardless of the number of substitutions a team has made already.