Napoli boss Carlo Ancelotti said his side were "ready for Liverpool" after warming up for next week's Champions League clash at Anfield with a 4-0 win over Frosinone.
Italian tax police have seized more than €2.6m (£2.3m) from Sampdoria, its president Massimo Ferrero and five other people as part of a fraud investigation.
Napoli lost further ground on Serie A leaders Juventus after they could only manage a goalless draw at home to bottom club Chievo.
Manchester United could approach Fiorentina to sign defender Nikola Milenkovic in January, according to Sky in Italy.
AC Milan scored a 97th-minute winner at Udinese through Alessio Romagnoli to regain fourth place in Serie A on Sunday.
Dries Mertens came off the bench to score a last-gasp equaliser as Napoli drew 1-1 at Roma in Serie A on Sunday.
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