Real Madrid coach Zinedine Zidane has been impressed by Raul de Tomas this season.
On-loan with Rayo Vallecano, De Tomas is blocked from facing his parent club on Sunday.
Zidane said, "That's an issue between the clubs. I'm not going to say any more because I'm not in charge of that, it's an agreement between Real Madrid and Rayo and it has to be respected.
"He's a player that I coached when he was with Castilla and he's got no shortage of talent. Perhaps what he was missing was the opportunity to play for a top-flight team and he's doing very well and has scored a lot of goals this season.
"He links up well with his teammates, knows how to play good football and I'm really happy for him. I got on well with him during my time in charge of Castilla."