Mati Fernandez and Giuseppe Rossi allowed Fiorentina to power past Atalanta in Bergamo.
Torino continued their strong start to the campaign with a 2-1 victory away to Bologna, their first here in 32 years.
It was a crazy 2-2 draw for Cagliari with three goals in stoppages, an incorrectly disallowed Sampdoria goal and goalkeeping howlers.
It was a disappointing stalemate between two sides who are clearly in poor form at the moment, though Catania got their first point.
Udinese scored the fastest goal of the season, but Chievo fought back to earn their first victory of the campaign.
Genoa and Livorno both had great opportunities to win, denied by the woodwork, a goalline clearance and extraordinary defending, but it ended goalless.
Fernando Llorente scored his debut Juventus goal to complete their comeback, beating Hellas Verona 2-1.
Mario Balotelli saw a penalty saved for the first time in career, as Napoli ended their Milan curse to conquer San Siro 2-1.
Federico Balzaretti was moved to tears after scoring the Rome Derby winner, allowing Roma to take revenge on 10-man Lazio.
Diego Milito bagged a brace on his comeback as Inter utterly humiliated sorry Sassuolo 7-0.