The 30-year-old, who made four league appearances last season, has been training with the club for the past two weeks.
According to various reports in Italy, the deal also allows Sassuolo the option to purchase the keeper at the end of the season.
Napoli have signed goalkeepers Pepe Reina and Rafael this summer.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Atalanta BCAtalanta | 15 | 11 | 1 | 3 | 38 | 17 | 21 | 34 |
| 2 | Napoli | 15 | 10 | 2 | 3 | 21 | 10 | 11 | 32 |
| 3 | Inter Milan | 14 | 9 | 4 | 1 | 34 | 15 | 19 | 31 |
| 4 | Fiorentina | 14 | 9 | 4 | 1 | 28 | 10 | 18 | 31 |
| 5 | Lazio | 15 | 10 | 1 | 4 | 30 | 17 | 13 | 31 |
| 6 | Juventus | 15 | 6 | 9 | 0 | 24 | 10 | 14 | 27 |
| 7 | AC Milan | 14 | 6 | 4 | 4 | 24 | 16 | 8 | 22 |
| 8 | Bologna | 14 | 5 | 7 | 2 | 20 | 18 | 2 | 22 |
| 9 | Udinese | 15 | 6 | 2 | 7 | 18 | 22 | -4 | 20 |
| 10 | Empoli | 15 | 4 | 7 | 4 | 14 | 15 | -1 | 19 |
| 11 | Roma | 15 | 4 | 4 | 7 | 18 | 21 | -3 | 16 |
| 12 | Torino | 15 | 4 | 4 | 7 | 16 | 20 | -4 | 16 |
| 13 | Parma | 15 | 3 | 6 | 6 | 21 | 25 | -4 | 15 |
| 14 | Genoa | 15 | 3 | 6 | 6 | 13 | 24 | -11 | 15 |
| 15 | CagliariCagliari | 15 | 3 | 5 | 7 | 15 | 25 | -10 | 14 |
| 16 | Lecce | 15 | 3 | 4 | 8 | 8 | 26 | -18 | 13 |
| 17 | Como | 15 | 2 | 6 | 7 | 16 | 28 | -12 | 12 |
| 18 | Hellas VeronaHellas Verona | 15 | 4 | 0 | 11 | 18 | 37 | -19 | 12 |
| 19 | Monza | 15 | 1 | 7 | 7 | 13 | 19 | -6 | 10 |
| 20 | VeneziaVenezia | 15 | 2 | 3 | 10 | 13 | 27 | -14 | 9 |
| > Serie A Full Table | |||||||||
