Hatem Ben Arfa sustained an injury to his left ankle in a tackle during the club's friendly against Sporting Kansas on Wednesday evening and went to a local hospital for a precautionary x-ray.
Consequently he will be leaving the club's US tour tomorrow and the injury will be reassessed over the next 48 hours.
Tickets for Newcastle United's home game against Manchester United are now on sale to members from £42 for adults & £21 for children.
Save a massive 40% when you subscrible to the NUFC digital matchday programme.
We're running competitions to win tickets and matchday experiences. Check them out here.