Newcastle United boss Eddie Howe is waiting on scan results for Kieran Trippier.
The fullback was forced off in victory over Wolves yesterday.
Howe said after the 3-0 win, "He definitely felt something in his calf, he had to be replaced, so that is worrying for us.
"I don't know how serious it is right now."
Newcastle are next in action against Chelsea on Monday, March 11.