Daniel De Jonge defeated William Jansen 4-6 6-2 6-4 in the M15 Kayseri 2 round of 32 on hard. The upset overturned the form book — William Jansen came in leading the head-to-head 1–0. Daniel De Jonge claimed a first win over William Jansen in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-07-31 | M15 Dublin 1 | R16 | carpet | William Jansen | 6-1 6-4 |
De Jonge D.: 14 days rest · 1 match (14d). Higher means fresher. About