Ajax coach Erik ten Hag has offered Chelsea boss Frank Lampard advice on how to best manage Hakim Ziyech.
Ziyech is joining Chelsea next month after committing to a €44m deal earlier this season.
Ten Hag said: "Sometimes he is a trainer's nightmare, but you have to give him space.
"Hakim is 'what you see is what you get'. You see what his emotions are doing to him today.
"It is an emotional day for Hakim, but I hope he looks back on it in a good way.
"He comes in as a big man at Chelsea, a top club in Europe. That is the example for the younger players here.
"First become the best here, win titles and then take the step.
"He is a character, headstrong. But that also makes him brilliant.
"He sees things that others don't see."
