UEFA has asked FIFA and the International Football Association Board (IFAB) to review regulations regarding concussion.
The 2018-19 season saw high-profile examples of head injuries during games, including a worrying incident involving Jan Vertonghen.
Tottenham's centre-back was caught in the head during the Champions League semi-final against Ajax and later had to be helped from the field of play, having initially attempted to play on.
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Spurs later said tests showed Vertonghen did not sustain a concussion, but the incident sparked a debate over the way head injuries are handled in football.