Holders Juventus progressed to the quarter-finals of the Italian Cup with a 4-0 win at home to Cagliari on Tuesday.
Nicolo Zaniolo decided a hard-fought encounter in Sardinia by stroking home Raoul Bellanova's cut-back in the 66th minute.
Lazio continued their bid to crack Serie A's top four with a 2-1 win on Monday over struggling Cagliari, who finished the match in Rome with nine men.
Napoli are top of Serie A after thrashing Cagliari 4-0 on Sunday in a match which was stopped in the first half due to fan disorder
Claudio Ranieri waved goodbye to Cagliari and brought the curtain down on a near four-decade club coaching career with Thursday's 3-2 defeat to Fiorentina cruelly inflicted in the 13th minute of added time.
Inter Milan are one step away from having the chance to win the Serie A title in the Milan derby as they welcome in-form Cagliari to the San Siro on Sunday.
Paulo Dybala scored twice as Roma eased to a 4-0 thumping of Cagliari at the Stadio Olimpico on Monday to notch a third straight Serie A win under Daniele De Rossi.
Khvicha Kvaratskhelia swept home the decisive strike in the 75th minute, six minutes after Victor Osimhen's headed opener and shortly after Leonardo Pavoletti had equalised for the away side.
Inter Milan stayed perfect in Serie A as they won 2-0 at Cagliari in the last match of the second round on Monday.
Former Uruguay international midfielder Fabian O'Neill, once hailed by Zinedine Zidane as "the most talented player" he'd ever seen, died Sunday after a long battle with alcoholism
Serie A: Zlatan Ibrahimovic scored two goals on his first start in two months for AC Milan as they beat Cagliari 2-0 on Monday.
Napoli came from a goal down to beat Sampdoria 2-1 at the newly-named Stadio Diego Armando Maradona while Inter Milan beat Cagliari 3-1.
The matches between title-chasing Inter Milan and Sampdoria, Atalanta against Sassuolo and Hellas Verona versus Cagliari have been pushed back to avoid the spread of coronavirus.
AC Milan move up to eighth in the Serie A table, 10 points off the Champions League berths.
Cristiano Ronaldo scored his first Serie A hat-trick to lift Juventus top of Serie A, while Zlatan Ibrahimovic failed to inspire AC Milan on his return.
Blaise Matuidi was one of the three Juventus players abused with monkey noises during a victory at Cagliari during the week
Inter Milan's 4-1 loss was their first home defeat to Cagliari since 1995. City rivals AC Milan had to settle for a point at promoted Cesena.
Cagliari turned on the style to hold Inter Milan to a 2-2 draw at the San Siro on Sunday as Fiorentina hammered 10-man Atalanta 4-1 at home to take over third place from Napoli.