“Tomorrow he will definitely not be ready to play,” Celada told Marca on Friday referring to the Manchester United stopper.
De Gea, who was injured making a save from striker Paco Alcacer, played in Spain’s previous qualifier against Luxembourg in place of usual first-choice Iker Casillas who was off form.
“The keeper David de Gea was forced to stop training after suffering an injury to the fifth finger of his right hand,” read a statement on sefutbol, the national team’s official website.
“Having suffered a similar situation in the past, De Gea will remain with the squad and will wait to see how he improves.”
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Spain, second in Group C with six points from three games, three points behind Slovakia, have a friendly with Germany on Tuesday after hosting Belarus at the Estadio Nuevo Colombino.
(Reporting by Tim Hanlon, editing by Ken Ferris)
