Giovanni Di Lorenzo made sure Napoli will stay top of Serie A this weekend after firing the winner in Saturday's 1-0 victory over Lecce to move his team five points clear
Dusan Vlahovic scored twice as Juventus made it two convincing wins to start the Serie A season with a 3-0 victory at Verona on Monday.
Sunday's win moved Milan three points ahead of third-placed Juventus in the race for Champions League football.
Davide Frattesi put Inter Milan five points clear at the top of Serie A on Saturday with a last-gasp winner which gave his team a thrilling, and controversial, 2-1 victory over Verona.
The Italian football league has launched an enquiry after Napoli striker Victor Osimhen suffered racist abuse from the stands during a Serie A match at Hellas Verona on Monday
The great-grandson of Italian dictator Benito Mussolini was on Sunday named in Lazio's squad for their Serie A match at Verona.
Serie A: Rade Krunic curled in a free-kick after 27 minutes with Manchester United loanee Diogo Dalot doubling the visitors' account five minutes after the break to pull AC Milan three points behind Inter Milan, who host in-form Atalanta on Monday.
Juventus, nine-time reigning Serie A champions have stalled under new coach Andrea Pirlo after winning their opener against Sampdoria, their only victory on the pitch in Serie A this season.
Lecce lost 3-4 at home to mid-table Parma but would have dropped down to Serie B even if they had won as relegation rivals Genoa thumped Hellas Verona 3-0.
Atalanta moved level on points with second-placed Inter Milan, but are six points adrift of Serie A leaders Juventus.
Cristiano Ronaldo found the back of the net again but Juventus paid for defensive errors in their shock loss to Hellas Verona.
Luca Toni still remains a potent force as he had finished as Serie A's joint highest scorer last season with Inter Milan's Mauro Icardi on 22 goals.
Luca Toni was the joint top scorer in the Serie A last season along with Mauro Icardi, becoming the oldest player to earn the accolade.
AC Milan are now only five points behind leaders Juventus, held 1-1 at Sassuolo on Saturday, while Roma put three unanswered goals past Chievo to reinforce their grip on second spot and reduce their deficit to a point.
Milan opened the scoring inside the opening quarter of an hour when midfielder Andrea Poli finished off a smart pass from Italy striker Mario Balotelli.
The sun was shining once again, but a stiff wind picked up for the third round of the inaugural Turning Stone Resort Championship at the Atunyote Golf Club