Juventus overcame the earliest of setbacks to beat 10-man AC Milan 3-2 and keep runaway Serie A leaders Roma in check.
The capital club shocked Inter Milan 3-0 at San Siro on Saturday night to leave Juve and Napoli five points adrift and, after the Azzurri managed to narrow the gap with a 4-0 win over Livorno, the Turin club's quest to catch up started poorly.
Sulley Muntari gave Milan the lead after only 19 seconds of play at the Juventus Stadium but Andrea Pirlo soon levelled with a free-kick against his former club.
For a while the game seemed to be heading towards a bad-tempered draw, until Sebastian Giovinco scored from the bench with Giorgio Chiellini compounding Milan's misery after visiting defender Philippe Mexes was sent off after an hour.
Muntari would double his personal tally on the stroke of full time but it was too little, too late for Milan.
Napoli also kept in touch with Roma as four different goalscorers helped trounce plucky Livorno 4-0 at the Stadio San Paolo.
Goran Pandev made the early breakthrough in Naples, further goals from Gokhan Inler and Jose Callejon guaranteed the Azzurri would close to within two points of the capital club before Marek Hamsik added a fourth at the death.
Lazio missed the chance to move up to fifth place in after a goalless draw with Fiorentina at the Stadio Olimpico.
Lazio did most of the running, creating enough chances to win the game, but failed to beat Fiorentina goalkeeper Neto.
Parma heaped further misery on rock-bottom Sassuolo with a 3-1 victory in a match which saw both sides reduced to 10 men.
Eusebio Di Francesco's promoted side have picked up just two points so far this term, but things looked promising at the interval when substitute Domenico Berardi stroked home a penalty in first-half stoppage time - following the dismissal of Parma goalkeeper Antonio Mirante - to get the visitors back on level terms after Raffaele Palladino's 32nd-minute opener.
However, the 10-man hosts showed little mercy on their struggling opponents and bagged two goals in seven minutes through substitute Aleandro Rosi and Antonio Cassano to seal the three points before Francesco Magnanelli's late red card rubbed salt into Sassuolo's wounds.
Udinese climbed into the top half of the table while prolonging their impressive unbeaten home run with a 2-0 victory over Cagliari.
Francesco Guidolin's men have lost all three of their games away from the Stadio Friuli in the new campaign but goals from Danilo and Antonio Di Natale secured a third win on home turf, where they last suffered a league defeat in September 2012.
Hellas Verona claimed their first Serie A away win in style on Sunday afternoon with an emphatic 4-1 victory at struggling Bologna.
Goals from Fabrizio Cacciatore and Juan Iturbe gave the visitors a commanding 2-0 half-time lead at the Stadio Renato Dall'Ara.
Alessandro Diamanti pulled a goal back from the penalty spot shortly after the restart, but Luca Toni swiftly restored Verona's two-goal cushion before Jorginho Freiro sealed matters in stoppage time.
Winless Sampdoria rescued a point at the death to stun Torino.
The visitors had come from behind and were seconds away from their third win of the campaign when Samp substitute Citadin Eder was fouled in the area and the referee pointed to the spot.
Eder made no mistake to earn his team a vital point in a 2-2 draw.
A late own goal from Nicola Legrottaglie handed Genoa a valuable point from a 1-1 draw at Catania.
The Sicilians were within sight of only a second win of the season thanks to Pablo Barrientos' goal on the hour mark, but their former Juventus defender Legrottaglie headed the ball into his own net three minutes from time.