Sunderland striker Fabio Borini was taken to hospital during the club's 2-2 draw at Cardiff City on Sunday after complaining of feeling unwell, manager Gus Poyet revealed.
Borini was substituted at half-time of the match at the Cardiff City Stadium, with Sky Sports reporting that the 22-year-old Italian had subsequently collapsed in the changing room.
"He's at hospital now," Poyet said after the game.
"Fabio was feeling very bad before the game. Just before the game he was sick. We decided together to play, but then at half-time it was impossible for him.
"Now to make sure everything is all right we've taken him to hospital. Let's hope it is nothing and he can go back on the plane (to Sunderland) now."
Jack Colback scored a 95th-minute equaliser in the match, which left bottom club Sunderland two points from safety in the Premier League.