Stoke City manager Michael O'Neill says he does yet know the extent of the injury suffered by Tyrese Campbell during his side's 2-1 defeat at home to Cardiff City on Tuesday night.

Having started the game, the striker set up a Sean Morrison own goal that had given the Potters a 1-0 half time lead, before being forced off ten minutes after the break with an apparent fitness concern.

Campbell's replacement Sam Vokes then missed the chance to double his side's advantage from the penalty spot, before goals from Robert Glatzel and Morrison himself turned the game in Cardiff's favour.

Speaking after the game about the problem that forced Campbell off, O'Neill confirmed it was a knee injury, but that the severity of the issue has not yet been revealed, as he told The Stoke Sentinel: "Not a the minute, he came off with his knee and it's too early to say."

O'Neill also admitted that the loss of Campbell had been a significant setback to his side, particularly wth regards to the penalty miss, as he went on to add: "We will see how he is in the morning but it was a blow to lose him as well because he is our first-choice penalty taker so he would have taken the penalty if he was still on the pitch so that in itself is a blow."

So far this season, Campbell has scored six goals in 16 league appearances for the Potters, putting him top of the club's individual scoring charts.
The Verdict
This will no doubt be a big concern for Stoke.
Campbell has started the season in impressive fashion, and does look like being an increasingly important figure to this Stoke side as he continues to improve with experience.
As a result, the Potters will surely not want to lose him for any extended length of time, meaning it does look as though they could be in for something of a nervous wait here, and with the injury problems they already have piling up, this has not come at a good time for O'Neill and Stoke.