James Milner recalls the change at Liverpool from Brendan Rodgers to Jurgen Klopp, his first impressions of the German and their conversation about converting him into a full back.

Gordon Strachan discusses Sir Alex Ferguson's impact at Aberdeen, his desire to win above all else, how the players were afraid to get injured because of the consequences, and what it was like to be the target of the manager's anger.

German legend Michael Ballack talks about the charisma of Jose Mourinho and how he got his Chelsea players to follow him.

Paul Merson compares the qualities of George Graham and Harry Redknapp, how Redknapp could be tougher than you think and the hilarious conversation that persuaded him to drop a division to go to Fratton Park.

ANNOUNCEMENT: Coming soon - Football’s Greatest: Eras with Nicky Butt and Paul Scholes. Join the pair as they take you inside one of the most dominant periods ever seen in the Premier League. Expect tales about Sir Alex Ferguson, Eric Cantona and David Beckham, the rivalries and the inside track on some of the biggest games and players from the 90s and 00s.

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Football's Greatest is a Folding Pocket production with BBC Studios.