Alan Shearer has called for the immediate introduction of temporary concussion substitutions after Wales defender Neco Williams was initially allowed to play on having suffered a head injury against England at the World Cup.
Full-back Williams was dazed and fell to the floor in the first half of the Group B game in Qatar after blocking a powerful Marcus Rashford shot with the top of his head.
The 21-year-old Nottingham Forest player received treatment on the field and then continued before eventually being replaced by Connor Roberts.