Marcello Siboni
Marcello Siboni is an Italian former racing cyclist. He rode in five editions of the Tour de France and seven editions of the Giro d'Italia.
Major results
;1986;1987
;1988
;1989
;1990
;1997
;1999
;2000
Grand Tour general classification results timeline
| Grand Tour | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 |
| Vuelta a España | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Giro d'Italia | 39 | — | — | — | 52 | — | — | 57 | — | 26 | 43 | — | — | 84 |
| Tour de France | — | — | 75 | — | — | — | — | 84 | 65 | 41 | — | — | 46 | — |