Newcastle United could have to deal with another first team star being out with injury.
The Magpies have been dealt several blows this season to their key players.
Now manager Eddie Howe is facing a new headache, with Callum Wilson taken off at half-time during their Champions League loss to Borussia Dortmund.
Not only did the Magpies lose 2-0, but Wilson came off with a hamstring problem.
Post-game, Howe said: "We tried to give ourselves two substitutes today to use when we needed them. Callum was feeling a tightness in his hamstring so that forced our hand as well. You don't need me to say we are stretched at the moment."
Defender Kieran Trippier also appeared to have an issue, but Howe was optimistic on his status.
"No, I think he's OK," the Newcastle boss added.
"He had a bit of a dead leg from the Arsenal game and they can be sore for a few days, but not a muscle problem."