Mitrovic apologises to Newcastle doctor after trying to play despite head injury

Newcastle striker Aleksandar Mitrovic has apologised to the club's doctor after having to be restrained as he tried to return to the pitch following a head injury.

The 21-year-old Serbia international was knocked unconscious minutes after scoring the Magpies' equaliser in Sunday's 1-1 derby draw with Sunderland at St James' Park.