| Boris de Schipper's Progress for 4 club async fountain in doubles | |||
|---|---|---|---|
| Duration | Date | Notes | |
| 266c | 2026-01-18 | - | |
| 108c | 2025-12-21 | - | |
| 98c | 2025-07-26 | - | |
| 53c | 2025-07-16 | - | |
| 43c | 2025-07-09 | - | |
| 39c | 2025-07-04 | - | |
| 29c | 2025-06-28 | - | |
| 12c | 2025-05-25 | - | |
| 11c | 2024-06-22 | - | |
| 9c | 2024-06-08 | - | |
| 8c | 2024-05-07 | - | |