A rare goal from Kevin Strootman helped Roma reclaim second place in the Serie A table as they beat derby rivals Lazio 2-0 on Sunday.
Giovanni Simeone scored twice as Genoa inflicted a 3-1 defeat on reigning champions and Serie A leaders Juventus on Sunday.
Juventus saw off Pescara 3-0 on Saturday to take a seven-point lead at the top, while Napoli and Chievo also claimed wins.
Joe Hart's Torino thrashed Cagliari 5-1, while Napoli were held to a 1-1 draw by Lazio in Serie A on Saturday.
Joe Hart was at fault for Mauro Icardi's first goal as Inter Milan beat Torino 2-1 in Serie A on Wednesday.
Frank de Boer's future as Inter Milan head coach is under serious threat after a 2-1 defeat to Atalanta in Bergamo on Sunday.
Juventus moved for points clear at the top of Serie A after a 3-0 victory at Empoli, while Napoli slipped up at Atalanta.
Juventus, who beat Cagliari 4-0, move to the top of Serie A after Napoli were held to a 0-0 draw at Genoa.
Mauro Icardi inspired a superb comeback win for Inter as they beat Juventus 2-1 on Sunday, while Roma lost at Fiorentina.
Mauro Icardi's stoppage-time strike earned Frank de Boer his first win as Inter Milan boss and sank Pescara 2-1.
Andrea Belotti scored a hat-trick and missed a penalty as Torino cruised to a 5-1 victory over Bologna in Serie A.
Inter Milan suffered a surprise 2-0 defeat to Chievo on the opening weekend of Serie A while Napoli also struggled.
Serie A champions Juventus saw their 47-match unbeaten home league record come to an end against Udinese.
Cagliari drew a line under 11 years in Serie A by beating Udinese 4-3 in their last game before submitting to relegation.
Fiorentina qualified for the Europa League while Stephan El Shaarawy scored his first goal in seven months for AC Milan.
Liverpool give U21s more game time than Premier League rivals but top flight lags behind Europe.
A last-gasp winner from substitute Marco Sau lifted Cagliari to a 1-0 victory at Cesena.
Cagliari lost 1-0 at home to Palermo to suffer relegation and have their 11-year run in Serie A come to a painful end.
Paul Pogba made a goalscoring return for Juventus, but the Bianconeri had to settle for a 1-1 draw against Cagliari.
Paul Pogba made a goalscoring return for Juventus while AC Milan won their first match for over a month on Saturday.