Giuseppe Rossi scored a 15-minute hat-trick as Fiorentina staged an astonishing recovery to beat Juventus 4-2 in Serie A, ending their opponents' unbeaten start to the season.

Juventus were cruising after a controversial Carlos Tevez penalty and Paul Pogba goal gave them a 2-0 halftime lead before Rossi, back this season after successive knee injuries effectively side-lined him for two years, converted a 66th-minute penalty to spark the fightback.

Rossi equalised in the 76th minute, Joaquin Sanchez put Fiorentina ahead two minutes after that and Rossi then finished off a counter-attack, leaving Juventus five points behind leaders AS Roma and level with Napoli.

Top-flight debutants Sassuolo beat Bologna 2-1 for their first Serie A win and Sampdoria converted two penalties, the second in the sixth minute of stoppage time, for a 2-1 win at Livorno.

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