Celtic manager Martin O'Neill is in hospital following "a small procedure," the club has confirmed. The 74-year-old is expected to be released within the next day or two, according to Celtic.

While specific details about the procedure were not disclosed, the club expressed gratitude for the well wishes from supporters and requested privacy for O'Neill and his family. O'Neill was appointed permanent manager this summer after leading Celtic to a Premiership and Scottish Cup double last season. He was present in the dugout on Monday for Celtic's league title defence opener, a 1-0 victory over Dundee at Parkhead.

Celtic's next match is an away fixture against Kilmarnock on Sunday, which will be broadcast live on Sky Sports.