The 19-year-old Dutch striker left Feyenoord for Inter in the summer transfer window and is considered to be one of the best attackers of his generation. "Our group is made up of mature players, but also of youngsters, who I hope will give their best together with us. We need them, and in fact they are helping us. They're making a great contribution," Samuel said to Inter Channel. "I really like Castaignos, he moves like a true centre forward. He's difficult to mark, he's fast and he has a nose for goal. "We just need to give him a bit more time to find his feet. He'll get better once he starts playing regularly."