[PAR] [TLE] Jasper Cillessen [SEP] Jacobus Antonius Peter "Jasper" Cillessen (] ; born 22 April 1989) is a Dutch professional footballer who plays as a goalkeeper for Spanish club FC Barcelona and the Netherlands national team. [PAR] [TLE] Diederik Boer [SEP] Diederik Boer (born 24 September 1980 in Emmeloord, Netherlands) is a Dutch football player who plays as a goalkeeper.  He currently plays for PEC Zwolle in the Eredivisie.  Boer made his professional debut on 8 March 2003, when FC Zwolle lost to Ajax 5–0.  On 31 August 2014 Boer signed a three-year contract with Ajax to replace the departed Kenneth Vermeer as second keeper behind Jasper Cillessen.
[PAR] [TLE] Jasper Cillessen [ SEP ] Jacobus Antonius Peter " Jasper " Cillessen ( ] ; born 22 April 1989 ) is a Dutch professional footballer who plays as a goalkeeper for Spanish club FC Barcelona and the Netherlands national team . [PAR] [TLE] Diederik Boer [ SEP ] Diederik Boer ( born 24 September 1980 in Emmeloord , Netherlands ) is a Dutch football player who plays as a goalkeeper . He currently plays for PEC Zwolle in the Eredivisie . Boer made his professional debut on 8 March 2003 , when FC Zwolle lost to Ajax 5–0 . On 31 August 2014 Boer signed a three - year contract with Ajax to replace the departed Kenneth Vermeer as second keeper behind Jasper Cillessen .
Who did Diederik Boer replace to be behind a Dutch professional footballer?
Who did Diederik Boer replace to be behind a Dutch professional footballer ?
Kenneth Vermeer
Kenneth Vermeer