All available race results Siersack
| Date | Race | Rank |
| 22/11 | Rondom Antwerpen | 17 |
Rider information for 1891
| Rank | 1014 |
| Score | 5 |
| Name | SIERSACK |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 18/06 | Bruxelles - Spa | 5 |
| 06/08 | Bruxelles - Leuven - Bruxelles | 5 |
Rider information for 1893
| Rank | 293 |
| Score | 24 |
| Name | SIERSACK |
| Country | Belgium |
| Team | Individual |