Sampdoria moved up to third in Serie A thanks to a 1-0 victory in the Derby della Lanterna on Sunday night.
Cagliari moved off the foot of the Serie A table as Albin Ekdal's 15-minute hat-trick saw them beat 10-man Inter Milan.
Sampdoria extended their unbeaten run to four games with a 2-1 triumph over Chievo in Genoa.
Argentina goalkeeper Sergio Romero has rubbished reports suggesting that he snubbed a move to Manchester United.
Sampdoria keeper Emiliano Viviano came to to rescue as Sassuolo threatened to condemn them to a first defeat.
AC Milan edged a nine-goal thriller with Parma at the Stadio Tardini to join Juventus and Roma at the top of Serie A.
Live only on