Young Seok Kim defeated Boy Westerhof 6-4 2-6 6-4 in the China F2 qualifying round on clay. The upset overturned the form book — Boy Westerhof came in leading the head-to-head 1–0. Young Seok Kim claimed a first win over Boy Westerhof in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-04-13 | China F3 | R32 | clay | Boy Westerhof | 6-2 6-4 |
Averages over each player's completed matches in the selected window (87 vs 23). 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