Inter Milan recorded an eighth-successive win in all competitions, but only after struggling to break down relegation-threatened Palermo in a 1-0 win.
Juventus got back on track in a 2-0 win against Lazio in Serie A, while Inter Milan won their eighth match in a row with a defeat of Palermo.
Juve boss Massimiliano Allegri chose an all-out attacking XI against Lazio and it worked, with goals from Paulo Dybala and Gonzalo Higuain.
Dybala notched his fifth league goal of the season five minutes into the contest at the Juventus Stadium.
Juventus got back to winning ways thanks to first half goals from Paulo Dybala and Gonzalo Higuain.
AC Milan coach Vincenzo Montella said his side "played on par with Napoli" despite suffering a 2-1 defeat at home on Saturday.