Luca Marianucci, the 22-year-old Napoli defender, was sent off during Sunday's Serie A Round 10 fixture against Juventus, a dismissal that drew sharp scrutiny and left Allegri's side exposed at a moment when the club could ill afford further defensive complications.
The red card is the defining event of Marianucci's season so far — and not in a way that builds a case for regular minutes. With only two Serie A appearances to his name in 2026-27 and an average match rating of 6.24, the young defender had limited room for error each time Allegri handed him an opportunity. Sunday's dismissal consumed whatever goodwill those appearances had generated.
The broader context sharpens the damage. Napoli sit eighth in Serie A with 14 points from ten matches — four wins, two draws, four defeats — and a defensive record of 13 goals conceded. That is not a backline operating with authority, and a red card from a defender who was already fighting for his place does nothing to stabilise it. Allegri's squad now faces whatever fixture follows against Juventus a man light in the disciplinary ledger, with Marianucci almost certainly suspended.
The post-match assessment of the Napoli players was unsparing. Marianucci was singled out as the figure who, in the match reviews circulating after the final whistle, had failed his examination and, in the bluntest reading, ruined everything. Whether that verdict is proportionate depends on what the full match context eventually reveals, but the headline is clear enough: the red card was the story, and Marianucci was at the centre of it.
The moviola discussion around the dismissal noted a high contact incident, with the question of whether Koopmeiners warranted a red card also raised — but Marianucci's expulsion was not in dispute. Juventus, themselves in crisis coming into the match, overtook Napoli in the table by the end of Round 10.
His AI overall of 68 out of 100, with a potential of 78, suggests the analytical models still see development ahead. But potential is a projection, not a shield. At 22, Marianucci has the profile of a player who should be accumulating experience and building trust with his coach. A red card in a high-profile away fixture does the opposite. Allegri now has every reason to return to more established options, and Marianucci will need to wait — and wait cleanly — for the next opening.