"I want him to win some stuff and I think Manchester United is not the club that they used to be and they're not ready to win stuff.
"I think Liverpool would be a good fit with [Virgil] van Dijk, that would be fantastic. Paris Saint-Germain as well with Marquinhos, there would be two great central defenders.
"I think Chelsea will need a player like that. I don't know if Koulibaly will be interested, but even if they have two very good central defenders, Koulibaly I think belongs to another level and would fit very well.
"I know he has a link with Liverpool, Van Dijk and Koulibaly at the back - my God, that's going to be another Red season I guess.
"You have to make a choice at certain points. The question was 'what is the best fit for Koulibaly?' and definitely with Van Dijk, and when you're a defender like Koulibaly, that would be the best central defence in the world."