According to VoetbalPrimeur, NEC has broken open and extended Fonville's contract, with the club rewarding the defender for his rapid development since joining from FC Dordrecht in 2025. Fonville has since become a key player for NEC, making 41 appearances and providing three assists. The international from Curaçao has also represented his country at the World Cup.
Multiple clubs were reportedly interested in Fonville during the transfer period, but the defender chose to stay with NEC. The club's technical director, Carlos Aalbers, has praised Fonville's development, stating that the defender's rapid growth has not gone unnoticed. Fonville's new contract adds an extra year to his previous deal, which was set to expire in 2029.