Jumpei Yamasaki defeated Niki Kaliyanda Poonacha 6-4 3-6 6-1 in the Vietnam F1 round of 16 on hard. The upset overturned the form book — Niki Kaliyanda Poonacha came in leading the head-to-head 1–0, but Jumpei Yamasaki had been the form player, winning 5 of their last 9 on hard. Jumpei Yamasaki claimed a first win over Niki Kaliyanda Poonacha in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-08-15 | M15 Jakarta 2 | R16 | hard | Niki Kaliyanda Poonacha | 6-4 6-7(1) 7-5 |
Averages over each player's completed matches in the selected window (198 vs 148). 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