The youngster is yet another highly talented product of the Ajax youth system, and Benitez said he was delighted to have the player at Anfield.
Rafa said, "Jordy is a very good finisher. He's a young boy who will need time but he is a player for the future. He can score a lot of goals."
He added, "We're always working to see if we can improve the squad. It's important that we work until the end."