"Erwin van de Looi told me after my first friendly game in Groningen that he'd like to sign me," the 20 year old Hungarian told Nemzeti Sport.
"I outgrew the second team so I'm happy that I signed to Holland and I can show myself in the first team of a first division team. It's important that I can go on with my development here."
He added: "I'm prepared for the city and the club. This was Luis Suarez' first club in Europe and Arjen Robben and Erwin Koeman also played here."