Gonzalo Higuain fired Napoli to the Serie A summit as they won 2-1 in Monday's top-of-the-table clash at home to Inter Milan.
Inter Milan returned to the top of Serie A with a comfortable 4-0 home win over Frosinone on Sunday evening.
Fiorentina returned to the Serie A summit with victory at Sampdoria on Sunday, while Lazio lost to Roma in the Rome derby.
Fiorentina claimed a handsome 4-1 victory over Frosinone at the Stadio Artemio Franchi to move top of Serie A.
Gianluigi Donnarumma made history on Sunday by becoming the youngest goalkeeper ever to start a match in Serie A.
Roma won 2-1 at Fiorentina on Sunday for their fourth straight league win and leapfrogged their opponents into top spot.