'World Rugby has lost total control of concussion' - Dr Barry O'Driscoll fumes over Conor Murray and Johnny Sexton incidents

Munster are the latest club to face an investigation over their handling of a suspected head injury after Conor Murray was allowed to play on despite appearing to lose consciousness briefly in the Irish province’s Champions Cup win in Glasgow, while Northampton wing George North has attacked the ­media for their coverage of his ­recent concussion.