Chelsea will make their own assessment of Alvaro Morata's hamstring injury later this week after the striker was ruled out of international duty with Spain.
The 24-year-old was substituted after 35 minutes of Chelsea's 1-0 loss to Manchester City in the Premier League last Saturday.
Chelsea head coach Antonio Conte expressed hope Morata's departure had come prior to serious injury to his left hamstring.
But the results of a medical assessment by the Spanish Football Federation suggest Morata could be out for around four weeks.