Aberdeen goalkeeper Jamie Langfield is recovering in hospital after suffering a seizure on Monday morning.
The 31-year-old was taken to Glasgow's Southern General hospital, where his condition has been described as "stable".
The Paisley-born keeper has made 38 appearances for the Dons this season, helping them to a ninth-placed finish in the Scottish Premier League.
Aberdeen's chief executive Duncan Fraser told the club's official website: "Obviously this is an extremely worrying time and the thoughts of everyone at the club are with him (and his family).
"Jamie has had a comfortable night and there have been no further setbacks but until the results of the tests he has undergone are known, we are not in a position to comment further."
Langfield joined Aberdeen from Dunfermline in 2005 and has made 187 appearances for the club. His current contract runs through to next summer.