Inter Milan went back top of Serie A with the easiest of 4-0 wins over Frosinone on Sunday evening.
Jonathan Biabiany put Inter ahead in the first half and that allowed Nerazzurri to run riot after the break, scoring three goals.
Mauro Icardi, Jeison Murillo and Marcelo Brozovic did the damage to earn a fourth straight win and knock Napoli down to second.
Napoli maintained their impressive form with a 2-0 win at Hellas Verona to send them top for a few hours before Inter's victory.
Maurizio Sarri's men were made to work hard, though, as they had to rely on quickfire second-half goals from Lorenzo Insigne and Gonzalo Higuain.
An unmarked Insigne broke the deadlock in the 67th minute, with Higuain's close-range second following soon after.
Once Napoli got in front there was little hope for Verona and the visitors saw out a fifth successive league match without conceding a goal and a 12th game unbeaten overall.
They were later joined on 28 points, though third on goal difference, by Fiorentina, who came from two down to earn a 2-2 draw against Tuscan rivals Empoli.
Goals from Marko Livaja and Marcel Buchel gave Empoli a first-half lead in Florence before Kalinic came on after the restart to spark the Viola's attack.
The Croatian forward headed in Fiorentina's first in the 56th minute before getting behind Khouma Babacar's cross to tap-in the equaliser four minutes later.
Kalinic almost struck his third of the afternoon in the 78th minute but saw his bullet shot rattle the crossbar with Empoli goalkeeper Lukasz Skorupski beaten.
An Antonio Candreva penalty in the 69th minute rescued a point for Lazio in a 1-1- draw with Palermo at the Stadio Olimpico.
Edoardo Goldaniga put the visitors ahead in the 21st minute. Off a corner, the Italian's shot from the edge of the box found its way past Lazio keeper Federico Marchetti and into the bottom left corner.
Candreva then secured the shared points in the second half, converting past Stefano Sorrentino after Oscar Hiljemark took down Senad Lulic inside the box.
Udinese secured a much needed 1-0 victory against Sampdoria at the Stadio Friuli.
Vincenzo Montella was unveiled as Sampdoria's new manager earlier in the week after Walter Zenga was fired following just 14 games in charge.
But the former Fiorentina manager got off to a losing start on Sunday after Udinese midfielder Emmanuel Agyemang-Badu scored the only goal of the game.
The Ghanaian ghosted into the Sampdoria box and converted Cyril Thereau's knock-down with 34 minutes gone. And Ervin Zukanovic was shown a straight red card for a foul on Agyemang-Badu in the closing minutes.
Chievo halted a seven-match winless run with a 2-1 triumph at strugglers Carpi.
Roberto Inglese headed Valter Birsa's cross into the back of the net for Chievo's opener in the eighth minute before setting up Riccardo Meggiorini to score the visitors' second six minutes later.
An own goal from Chievo defender Alessandro Gamberini in the 61st minute allowed Carpi to halve the deficit but the hosts could not find an equaliser.
Torino defeated Atalanta 1-0 at the Atleti Azzurri D'Italia stadium.
Cesare Bovo scored the game's only goal, slotting home a right-footed shot from the center of the box in the 52nd minute to give the visitors the victory.
Genoa needed a late winner to escape with a 2-1 home win over plucky Sassuolo.
Tomas Rincon's 51st-minute opener for the Genoans was cancelled out by a strike from Francesco Acerbi three minutes into stoppage-time.
But Leonardo Pavoletti answered just two minutes later, sealing the three points with a header from close range.