Schalke chief Christian Heidel is convinced by the potential of new signing Rabbi Matondo.
S04 swooped for the former Manchester City winger last week in a €9m deal.
"He's 18 years old, we know that, but we've been watching him for so long," said Heidel.
"He has all the stuff to play in the Bundesliga.
"This is a player that Domenico (coach Tedesco) thinks he can help us immediately."