After a successful stint in the Eredivisie, De Ligt is eager to see their partnership flourish in the competitive environment of the Premier League.
"Yeah obviously (he was) a really important part because he knows me really well, I know him really well," De Ligt told club media.
"He made me captain also at Ajax.
"Also at my time at Ajax he gave me a lot of confidence, he gave me a lot of motivation to try to lead the team."
"He's really demanding, I think," the Netherlands international added.
"He demands, every day, every moment of the training session, he demands a lot.
"Not only on the training pitch, but also outside; how you behave, how you take care of your body, how you rest, how you sleep. And he's really into discipline.
"That suits really well with the way I see being a professional footballer."