Ajax chief Edwin van der Sar says Frank De Boer can prove himself at Crystal Palace if given time.
The pair played together at Ajax and Holland in their playing days, and worked together at Ajax during de Boer's time as head coach in Amsterdam, with van der Sar currently the chief executive officer at the Eredivisie side.
"I have worked with him for five years and played with him for a long time, and he is a fantastic coach," van der Sar told reporters at a recent Soccerex event.
"They set out together and they should hold on to that and make sure that they turn it around and that he is going to be a success at Crystal Palace, with what they want to achieve."