Christian Thielsen Keller (born 17 August 1980) is a Danish former professional footballer who played as a defensive midfielder.

Born in Brørup,[4] Keller started playing football in nearby Vejen,[4] before moving to top-flight club Vejle BK.

He spent three years at Viborg, playing 92 league games and scoring 11 goals,[3] until his contract ran out in June 2005.

He moved abroad on a free transfer, to play for Italian club Torino F.C., who looked to win promotion for the top-flight Serie A championship.

Borring left the club in March shortly after the incident, and on 20 June 2016 it was announced that Randers FC had released Keller.