Former Manchester United midfielder Roy Keane has revealed that the best manager he ever worked with was "without a doubt" Brian Clough and not Sir Alex Ferguson.
In an ITV documentary that looks at the fierce rivalry between Keane and Arsenal's Patrick Vieira, both players are asked who was the best manager they worked with.
Vieira chose current Gunners boss Arsene Wenger but the Republic of Ireland assistant manager shunned Sir Alex for Clough - who managed him at Nottingham Forest.
Sir Alex and Keane fell out during the midfielder's acrimonious departure from Old Trafford in 2005.
Watch Keane & Vieira - Best of Enemies at on ITV4, Tuesday 10th December 10th 2013