The Poland international had already been in doubt to play against Juventus on Thursday evening, as he had been ordered into quarantine by the ASL (local health authority).
Zielinski had already contracted COVID-19 in October 2020 and was positive for circa three weeks.
A statement this evening confirms Zielinski tested positive in the latest round of swabs.
He is self-isolating at home and has no symptoms.
It now remains to be seen what Napoli will do with the other two players who are outside the quarantine exemption clause.
The Lega Serie A introduced a new protocol and sued the ASL from various regions in order to stop them over-ruling it.
However, Zielinski testing positive when he should’ve been in quarantine will not help their case.
It is still not clear whether Zielinski, Lobotka and Rrahmani got the all-clear to avoid the quarantine in Turin or if Napoli simply risked a fine by ignoring the order.
— Official SSC Napoli (@sscnapoli) January 8, 2022