Heerkens was born on May 8, 2006, in Broumov, Czech Republic. This summer, he became European champion with the Netherlands U19 team.
Alex Kroes: "We are pleased that Joeri Heerkens has chosen Ajax. Joeri is a talented young goalkeeper with all the qualities needed for the position: height, reflexes, composure, focus, and the right mentality. He shows commitment and an enormous drive to improve. We believe that he can develop wonderfully at Ajax and are confident that, in time, he can grow into the role of first-choice goalkeeper."