Napoli striker Arkadiusz Milik is set for an absence of around four months after undergoing knee surgery for the second time in as many seasons.

The Poland international limped off after coming on as a substitute during the second half of Saturday’s 3-2 win at SPAL.

Milik moved to Naples from Ajax before the start of last season but was sidelined between October and February after damaging his anterior cruciate ligament while on international duty.

The 23-year-old visited the Villa Stuart Clinic in Rome on Monday and Napoli released a statement confirming surgery was required.

Milik has scored three times in seven appearances for club and country this season, while the weekend win preserved Napoli’s 100 per cent start to the Serie A campaign.