Juventus beat AC Milan 2-0 at the San Siro to move 11 points clear atop the Italian Serie A table, while Napoli were held to a 1-1 draw with Livorno and Lazio were 1-0 winners over Fiorentina.
Young guns Mattia Destro, with a brace, and Miralem Pjanic were on target for Roma in a 3-0 win over Sampdoria to keep the Serie A title battle alive with Juventus, who defeated Chievo Verona 3-1 at home.
Goalkeeper Gianluigi Buffon was sent off as ten-man Juventus dropped points for the first time since October last year in a 1-1 draw at Lazio, while Napoli were held at home in a 1-1 draw with Chievo.
Juventus restored their eight-point lead over Roma at the top of Serie A with a 4-2 home win over Sampdoria, while their title challengers sent Livorno back to the bottom of the league with a 3-0 win.
Juventus, Roma and Napoli hit 11 goals between them to deliver a blow to pursuers Fiorentina and Verona, while AC Milan fell to Sassuolo in a seven-goal thriller with teenager Domenico Berardi scoring four goals.
After Juventus registered their ninth successive victory, beating Atalanta 4-1, club director Giuseppe Marotta has told i Bianconeri to maintain their focus despite their five points clear at the top of the Italian Serie A.