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, but Daniel De Jonge had been the form player, winning 4 of their last 5 on hard. 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 |
Averages over each player's completed matches in the selected window (48 vs 12). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About