Ernesto Valverde cautioned Spain against calling up Ansu Fati for next month's U-17 World Cup.
"He's still not been called up so we will see what happens. But it would be a setback because he's a player who's just coming into the first team and we don't know what will happen in that run of games [in October and November]," said Valverde.
Fati could miss up to five weeks if he were called up.
Fati is also eligible to play for Portugal and Guinea-Bissau.