Info
| Last name | Fontanelli |
| First name | Sigfrido |
| Nationality |  Italy |
| Date of birth | 01-10-1947 |
| Place of birth | Pulica di Montelupo |
| Passed away | 20-02-2004 |
| Age when passed away | 56 |
| Place of passing | Lastra a Signa |
Monuments
| Date | Rank | Race | |
|---|---|---|---|
| Giro d'Italia (2.HC) | |||
| 59 |  Standings | ||
| 12-06 | Stage 22Milano - Milano (122.0km) | ||
 Vuelta a España (2.HC) | |||
| 15-05 | DNS | Stage 19Alto de Urquiola - Miranda de Ebro (104.0km) | |
| 27-03 | 11 | Giro della Provincia di Reggio Calabria (1.1) | |
| 19-03 | 48 | Milano-Sanremo (CDM) | |
| Tirreno-Adriatico (2.1) | |||
| 11 |  Standings | ||
| 16-03 | Stage 5San Benedetto del Tronto - San Benedetto del Tronto (18.0km) | ||
