Which Ajax player that competed in the 1986-87 European Cup later became the assistant manager for Ajax? 
1986–87 European Cup Winners' Cup: The 1986–87 season of the European Cup Winners' Cup was won by Ajax in the final against Lokomotive Leipzig. 1986–87 European Cup Winners' Cup:  The young Ajax side, which included the likes of Marco van Basten, Frank Rijkaard and Dennis Bergkamp, was guided to victory by its coach Johan Cruyff. Dennis Bergkamp: Dennis Nicolaas Maria Bergkamp (] ; born 10 May 1969) is a former Dutch professional footballer, who is the assistant manager at Ajax.
Dennis Bergkamp