Dries Mertens will continue to be assessed after Napoli's leading goalscorer suffered an ankle injury.
Mertens netted the opener in a 2-0 win at local rival Benevento to go back into top spot in Serie A.
The Belgium international had to be replaced late in the second half after he was caught by a heavy challenge from Benevento defender Berat Djimsiti, who was booked for the tackle.
In a brief statement released, Napoli indicated Mertens's injury is not serious but placed no timescale on his recovery.
"Dries Mertens has suffered a light Grade I sprain to his left ankle," Napoli said. "His fitness will be assessed during training tomorrow."
Mertens has hit 14 goals in Serie A this term to help Napoli sit a point clear of champion Juventus at the top of the table.
Napoli is next in Serie A action at home to Lazio on Sunday (AEDT) before taking on RB Leipzig in the UEFA Europa League on Friday 16 February (AEDT).