All available race results Leo Nielsen
| Date | Race | Rank |
| 07/08 | Olympic Games Amsterdam - Road Race | 7 |
Rider information for 1928
| Rank | 171 |
| Score | 161 |
| Name | Leo NIELSEN |
| Country | Denmark |
| Team | Hillerød CK |
| Date | Race | Rank |
| 26/08 | World Championships Time Trial (Ama+Pro) | 4 |
Rider information for 1931
| Rank | 223 |
| Score | 100 |
| Name | Leo NIELSEN |
| Country | Denmark |
| Team | Individual |
| Date | Race | Rank |
| 04/08 | Olympic Games Time Trial | 9 |
Rider information for 1932
| Rank | 229 |
| Score | 119 |
| Name | Leo NIELSEN |
| Country | Denmark |
| Team | Hillerød CK |
| Date | Race | Rank |
| 18/08 | World Championships Road Race (Amateurs) | 10 |
| 26/08 | Praha - Karlovy Vary - Praha | 1 |
Rider information for 1934
| Rank | 566 |
| Score | 32 |
| Name | Leo NIELSEN |
| Country | Denmark |
| Team | Individual |