William Jansen defeated Daniel De Jonge 6-1 6-4 in the M15 Dublin 1 round of 16 on carpet. The upset overturned the form book — Daniel De Jonge came in leading the head-to-head 1–0. William Jansen claimed a first win over Daniel De Jonge in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-04 | M15 Kayseri 2 | R32 | hard | Daniel De Jonge | 4-6 6-2 6-4 |
De Jonge D.: 14 days rest · 1 match (14d). Higher means fresher. About