Stephan El Shaarawy got back on track in Bergamo, but Fiorentina threw it away in Catania and Mauro Icardi scored four in a tennis-style Marassi result.
Torino eventually scraped a 3-2 victory over Siena despite being decimated by bans, as Alessandro Rosina missed a last-minute penalty against his former club.
As expected, Napoli have officially signed Emanuele Calaiò, while Siena loaned Matias Martinez to Argentinos Juniors and Cagliari released Rui Sampaio.