The Chelsea striker suffered a scare at the weekend after hurting his foot and ankle in Spain's training session and underwent an X-ray with the 28-year old appearing to have escaped any serious injury. "He stays with the squad but his participation in the game on Tuesday in Paris is uncertain", said Spanish officials in a statement.
Costa, who is Brazilian born, is now on global duty with Spain and scored in their World Cup qualifier over Isreal in a dominant 4-1.
Julen Lopetegui expresses satisfaction with Diego Costa's form for both Spain and Chelsea after another goal.
"[As a result] he was submitted to a series of tests [X-ray and TAC] at Sanitas Clinic in La Moraleja, where finally he was given the okay".
"The footballer is still under observation and will remain with the team during training camp".
The Blues host Crystal Palace where they will look to extend their lead at the top of the Premier League table.
The Brazilian-born Spain global has often been linked with a return to La Liga having left Atletico Madrid to join Chelsea in 2014.