Juventus maintained their perfect record in Serie A as a 2-0 home win against Bologna gave the Turin club their best start to a season in 88 years.
Cristiano Ronaldo bounced back from his red card against Valencia by opening the scoring in Juventus' 2-0 win over Frosinone.
Gonzalo Higuain scored his first Serie A goal for AC Milan but they were held to a 1-1 draw at Cagliari on Sunday.
Blaise Matuidi scored the winner as Juventus beat Parma 2-1 to continue their perfect start to the Serie A season.
Torino staged a superb second-half recovery to heap more Serie A misery on Inter in a 2-2 draw at the San Siro.
Big-spending Inter Milan lost 1-0 at Sassulo on Sunday, as Roma and SPAL both chalked up away victories.
Watford have completed the signing of defender Adam Masina from Bologna on a five-year deal.
Watford are expected to announce the £3.5m signing of Adam Masina on July 1 after he completed a medical, Sky sources understand.
Inter came from behind to snatch the final Champions League place in their winner-takes-all clash at Lazio in Serie A on Sunday.
Juventus came from behind to beat Bologna 3-1 on Saturday, thanks to an inspirational performance from substitute Douglas Costa.
Napoli's dream of winning the Serie A title lies in tatters after they were humbled 3-0 by a Giovanni Simeone-inspired Fiorentina.
Benevento were relegated to Serie A the day after celebrating their shock victory at AC Milan as results elsewhere on Sunday condemned them to the drop.
Juventus saw their lead at the top of Serie A cut to four points after they were held to a 1-1 draw at Crotone and Napoli came from behind to beat Udinese 4-2.
Juventus bounced back from their European exit by extending their lead atop Serie A to six points.
Amadou Diawara left it late to fire Napoli to a nervy 2-1 victory over Chievo that keeps their Serie A title hopes alive.
All the latest transfer news from around Europe, with Andres Iniesta reportedly set to leave Barcelona for China.
Juventus warmed up for their Champions League clash with Real Madrid with a 3-1 victory over AC Milan.
Two goals in three second-half minutes helped Inter Milan to a 2-0 victory at home to Benevento.
Alex Sandro scored as Juventus bounced back from their Champions League collapse against Spurs with a 1-0 victory at Torino.
Yann Karamoh's first goal for Inter Milan settled their fraught 2-1 victory over nine-man Bologna at the San Siro on Sunday.