 Dennis Nicolaas Maria Bergkamp ( Dutch pronunciation : [ <unk> <unk> ] ; born 10 May 1969 ) is a Dutch former professional footballer , who is the assistant manager to Frank de Boer at Ajax . Originally a wide midfielder , Bergkamp was moved to main striker and then to second striker , where he remained throughout his playing career . Bergkamp has been described by Jan Mulder as having " the finest technique " of any Dutch international and a " dream for a striker " by teammate Thierry Henry . 
