Pol Wattanakul defeated S D Prajwal Dev 7-6 7-6 in the M15 Chiang Rai 6 round of 32 on hard. The upset overturned the form book — S D Prajwal Dev came in leading the head-to-head 1–0, but Pol Wattanakul had been the form player, winning 4 of their last 8 on hard. Pol Wattanakul claimed a first win over S D Prajwal Dev in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-12-04 | M15 Nonthaburi 2 | R32 | hard | S D Prajwal Dev | 2-6 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.