The former Ajax stopper has followed the youngster’s career since he was breaking through at his old club.
“I often ask myself: where was I at his age when he played the Europa League final? Or at the age of nineteen like now. He is captain of Ajax and I was with RKC Waalwijk,” Vertonghen told De Telegraaf.
“Ajax is so good at the moment that there are few intermediate steps. It is important for Matthijs to have a good season now and then hopefully take a nice step. After two and a half seasons he is ready for the big time.”