Sean Longstaff must see a specialist before learning how much of a part he could play in Newcastle United's remaining fixtures.
The Geordie midfielder was a huge miss in the 2-0 defeat against Arsenal as the Magpies lost the midfield battle as Jorginho and Granit Xhaka dominated the engine room contest. Longstaff picked up foot injury in the 4-1 win over Everton last month and has not been able to train.
It leaves him as a doubt for the trip to Leeds United on Saturday, and Eddie Howe is keen to learn more about the injury after initially being briefed it was only bruising for the Academy product. There was a hole in midfield at times against the Gunners with the opening goal from Martin Odegaard not closed down.
