| Founded | 1948 |
|---|---|
| First season | 1948-49 |
| Country | Belgium |
| Confederation | FIBA Europe |
| Divisions | 14 |
| Level on pyramid | 2 |
| Promotion to | Pro Basketball League |
| Relegation to | Derde Nationale |
| Domestic cup(s) | Belgian Cup |
| Current champions | Kortrijk Spurs (1st title) (2022–23) |
The Top Division Men One (TDM1), also known as the Belgian Second Division or the Tweede Nationale, is the second level of men's basketball in Belgium and the highest amateur level in Flanders.[1]
The league features 14 teams and the champion has the right to promote to the Pro Basketball League (PBL).