FIFA Concussion protocol questioned after Pereira blow

World players’ union FIFPro has called for an investigation into FIFA’s concussion protocol after Uruguay’s Alvaro Pereira was allowed to play on despite taking a blow to the head against England at the World Cup on Thursday.

Pereira was struck on the head by the knee of Raheem Sterling in the second half of Uruguay’s 2-1 win and received treatment on the pitch before returning to the action.