Atalanta, Serie A's leading scorers last season with 98 goals, began their new campaign in the same carefree, entertaining style from last season.
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Fiorentina grabbed a late goal through Gaetano Castrovilli to beat visiting Torino 1-0 in the opening match of the new Serie A season on Saturday.
Fiorentina took advantage of two defensive mishaps to beat Torino 2-0 in a Serie A match between two teams stuck in the middle of the table.
Torino captain Andrea Belotti scored for the seventh game in a row to complete a 3-0 win over relegation-threatened Genoa in Serie A.
Inter Milan staged an impressive second-half comeback to beat Torino 3-1 and move up to second place in Serie A on Monday.
Cristiano Ronaldo scored from a free kick for Juventus and Gianluigi Buffon made a record 648th Serie A appearance in a 4-1 win over Torino.
Serie A's leading scorer Ciro Immobile was on target again as Lazio came from behind for the second match in a row to beat Torino 2-1 on Tuesday.
Cagliari won for the second time in four days when they beat Torino 4-2 in Serie A on Saturday in their first home game with Walter Zenga as boss.