Yannick Vandenbulcke defeated Boy Westerhof 6-2 3-6 6-2 in the Portugal F7 round of 16 on clay. The upset overturned the form book — Boy Westerhof came in leading the head-to-head 1–0. Yannick Vandenbulcke claimed a first win over Boy Westerhof in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-05-08 | Italy F12 | QF | clay | Boy Westerhof | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.