Roma signed Justin Kluivert, the son of former Milan and Barcelona forward Patrick, from Ajax on Friday for a fee that could rise to 18.75 million euros ($21.8 million).

The 19-year-old Dutch international forward has agreed a five-year contract with Roma.

"I'm very happy. I'm at an incredible club," Kluivert said. "I cannot wait to start. I believe that Roma is the ideal team for my growth, which will allow me to play at the highest levels."

Kluivert junior made 56 appearances and scored 13 goals for Ajax. He has one cap for the Netherlands.

He joins Roma for an initial 17.25 million euros ($20.1 million) and performance-related clauses could see the price rise by 1.5 million euros.