The Dane has also worked with the Dutch giants.
He told the Blood Red podcast: "Ajax is a really exciting team.
"No matter when you play Ajax, you can be 100 per cent sure that there are a lot of young players and they play with an exciting, optimistic playing style.
"The thing is that Ajax is always a selling club so it is really different year to year. Two years ago, they went to the semi-final against Tottenham.
"But since then six, seven, eight really good players are sold to big clubs. They are a fantastic team and one of the favourites to take one of the two spots [to progress to the knockout stage].