Inter Milan got their Serie A campaign up and running with a come-from-behind 4-3 victory over Fiorentina at the San Siro Stadium.
Christian Kouame, Gaetano Castrovilli, Federico Chiesa got the goals for Fiorentina.
Lautaro Martinez, an own goal from Federico Ceccherini and Romelu Lukaku got Inter back into the game before Danilo D'Ambrosio snatched the winner for the hosts in the last minute.
Atalanta started their campaign on a high note after coming from behind to hammer Torino 4-2 at Stadio Olimpico.
The first stanza produced five goals, with Alejandro Gomez, Luis Muriel and Hans Hateboer making it 3-1 for Atalanta from behind.
Andrea Belotti grabbed a brace in the first stanza to make it 2-3 going to the break but Marten de Roon secured the three points for the visitors nine minutes after the break with the fourth goal for Gian Piero Gasperini's charges.
Lazio had a perfect start to the season with 2-0 victory over Cagliari at Sardegna Arena.
Manuel Lazzari got the opener for the visitors in the fourth minute and Ciro Immobile wrapped up the three points with 16 minutes remaining.