Stoke defender and Republic of Ireland international Marc Wilson sustained a suspected broken ankle in front of the watching Giovanni Trapattoni as Stoke were held to a draw at the Britannia Stadium.
Wilson had to be carried off on a stretcher after a challenge with Sunderland striker Steven Fletcher only a few minutes into the second half.
Asked for an update on Wilson's condition, Stoke boss Tony Pulis said: "He has gone to hospital straight away, so we are just waiting for confirmation of what it is. I think he actually did it himself. I think his studs got caught in the ground."
Meanwhile, Pulis admitted his frustration after seeing his side held to a goalless home draw in what was the Potters' sixth stalemate in nine Premier League games so far this season. In a contest of few clear-cut chances, the hosts posed the greater attacking threat but were unable to make a breakthrough and once again had to settle for a point.
Reflecting on his team's performance, Pulis said: "We went to win the game. I thought Sunderland defended really well and that their goalkeeper (Simon Mignolet) was outstanding. We needed a break. I've just looked at a few of the set-plays in the first half and how two of them stay out, I just don't know. That is what you need -- a bit of luck. It was always going to be a tight game. They are a good side -- we certainly don't look down our noses at Sunderland."
Sunderland, who also registered their sixth league draw of the campaign, offered little going forward, although they did have a penalty appeal turned down in the second half when Fletcher's shot hit Robert Huth's arm in the box.
Sunday Indo Sport