Former Barcelona and Ajax star Richard Witschge has no doubts about the quality of Frenkie de Jong.

De Jong will leave Ajax in the summer for Barca in a deal rising to €86m.

Witschge told RAC1: "For us it will be a great loss, because for me he is already one of the best players in Europe.

"He is playing at a very good level and he is strong with the ball."

On Ajax's shock Champions League win at Real Madrid, Witschge insists it shouldn't have been a surprise.

"Ajax can beat any team, as we saw against Madrid, the team played very well, as it did before against Bayern Munich," he added.