Newcastle United boss Steve McClaren has been left fuming after his summer signing Aleksandar Mitrovic received yet another yellow card on the weekend.

The 20-year-old received the 47th yellow card of his career while playing for Serbia against Armenia in Euro2016 qualifying.

He has already received two yellows and one red for the Magpies this season, and McClaren is concerned with the striker's disciplinary issues.

According to The Express, Mitrovic has been told to mend his ways in no uncertain terms by McClaren.