Open toernooi Diemen 2011
| 1/2 Finale | Finale | Winnaar | |||
| W Rieder | |||||
| 1. | Max Kohnstamm(1) | 6 | M Kohnstamm | ||
| 2. | Cees de Smalen | 6 | 6-3 4-6 6-2 | W Rieder | |
| 3. | Jacques Groen | 7 | W Rieder | 7-6 6-7 6-3 | |
| 4. | Willem Rieder | 7 | 6-3 6-1 | ||
| 5. | Arie van Engelen | 7 | J Tjon | 6-4 7-6 | |
| 6. | Jeff Tjon | 7 | w.o. | G van Walsem | |
| 7. | Gerry van Walsem | 7 | G van Walsem | 6-1 6-0 | |
| 8. | Kees Augustijn(2) | 6 | 6-2 6-7 7-5 | ||
