The Italian international, 24, has penned a five-year deal with the Serie A champions.
Juve will pay the transfer fee to Sassuolo over the next three years.
Zaza, who has spent the past two years at the Mapei Stadium, scored 11 goals in 34 appearances last season.
His international career has seen him score one goal in five games for the Azzurri.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Inter Milan | 33 | 27 | 5 | 1 | 79 | 18 | 61 | 86 |
| 2 | AC Milan | 33 | 21 | 6 | 6 | 64 | 39 | 25 | 69 |
| 3 | Juventus | 33 | 18 | 10 | 5 | 47 | 26 | 21 | 64 |
| 4 | Bologna | 33 | 17 | 11 | 5 | 48 | 26 | 22 | 62 |
| 5 | Roma | 33 | 17 | 7 | 9 | 59 | 39 | 20 | 58 |
| 6 | Atalanta BCAtalanta | 32 | 16 | 6 | 10 | 59 | 37 | 22 | 54 |
| 7 | Lazio | 33 | 16 | 4 | 13 | 42 | 35 | 7 | 52 |
| 8 | Napoli | 33 | 13 | 10 | 10 | 50 | 41 | 9 | 49 |
| 9 | Fiorentina | 32 | 13 | 8 | 11 | 45 | 36 | 9 | 47 |
| 10 | Torino | 33 | 11 | 13 | 9 | 31 | 29 | 2 | 46 |
| 11 | Monza | 33 | 11 | 10 | 12 | 35 | 43 | -8 | 43 |
| 12 | Genoa | 33 | 9 | 12 | 12 | 35 | 40 | -5 | 39 |
| 13 | Lecce | 33 | 8 | 11 | 14 | 30 | 48 | -18 | 35 |
| 14 | CagliariCagliari | 33 | 7 | 11 | 15 | 36 | 56 | -20 | 32 |
| 15 | Hellas VeronaHellas Verona | 33 | 7 | 10 | 16 | 31 | 44 | -13 | 31 |
| 16 | Empoli | 33 | 8 | 7 | 18 | 26 | 48 | -22 | 31 |
| 17 | Udinese | 33 | 4 | 16 | 13 | 31 | 50 | -19 | 28 |
| 18 | FrosinoneFrosinone | 33 | 6 | 10 | 17 | 40 | 63 | -23 | 28 |
| 19 | SassuoloSassuolo | 33 | 6 | 8 | 19 | 39 | 65 | -26 | 26 |
| 20 | Salernitana | 33 | 2 | 9 | 22 | 26 | 70 | -44 | 15 |
| > Serie A Full Table | |||||||||
