Get the latest United transfer window updates, pre-season news and analysis delivered straight to your inbox every day for free Rio Ferdinand has revealed his former captain Roy Keane's most underrated attribute as a player.
The two players were teammates at Manchester United between 2002 and 2005, when Keane was the captain of the club and Ferdinand had joined from Leeds in a £30m deal as the most expensive defender ever at the time.
Keane is often remembered as one of the greatest leaders in Premier League history, to go with his ferocious style in midfield of hard tackling and aggression as United dominated the league for the best part of a decade-and-a-half with him.
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