Antoine Griezmann and Ousmane Dembele have returned to light training with Barcelona, so could recover for the Champions League with Napoli.
The first leg of this Round of 16 tie ended 1-1 at the Stadio San Paolo and the decider is on August 8.
Barça have struggled in the final weeks of their domestic season, with Griezman suffering from a thigh injury and Dembele out of action since January.
Football Espana report that both players were seen in training with the rest of the squad.
It follows news that Clement Lenglet returned from his injury earlier this week.
However, Arturo Vidal is suspended, with Samuel Umtiti, Jean-Clair Todibo and Roland Araujo all expected to miss out.
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