Manchester United legend Roy Keane has taken a fresh swipe at former manager Sir Alex Ferguson.

Keane names Nottingham Forest legend Brian Clough the best manager he worked with.

Asked who he felt was the best boss during a 17-year career Keane said blankly: "Brian Clough, without a doubt."

In ITV's doco with Patrick Vieira, Keane was pushed on why not Ferguson.

"You asked me the question. I answered you."

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