Stanislav Lobotka underwent diagnostic tests upon his return to Naples after sustaining an injury while on international duty with Slovakia.
The tests revealed a Grade 1 hamstring (semitendinosus) strain in his left leg.
Alessandro Buongiorno, Giovanni Di Lorenzo, Khvicha Kvaratskhelia, Stanislav Lobotka, Cyril Ngonge and Giacomo Raspadori have also returned from international duty as the team continue preparations for their next Serie A game, away to Empoli on Sunday (12:30) kick-off.
