"Van Gaal as a trainer was one of the best - it was incredible how well he prepared for games," he told the Daily Mail. "Lippi was very, very good. He knew his team, he knew how to meld together a group and make it a team.
"[Fabio] Capello taught me so much about systems, about 4-4-2, how to pressure and squeeze a team. [Frank] Rijkaard is not a good trainer but he is a really good manager of people.
"You can see Mancini lacks people management, big time. I don't want to talk negative about somebody. I do not want to talk about Mancini as there were not so many positive things."