David Agung Susanto defeated Nutthanon Kadchapanan 6-1 6-0 in the Thailand F1 qualifying round of 32 on hard. The upset overturned the form book — Nutthanon Kadchapanan came in leading the head-to-head 1–0, but David Agung Susanto had been the form player, winning 4 of their last 8 on hard. David Agung Susanto claimed a first win over Nutthanon Kadchapanan in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-06-06 | Indonesia F3 | R16 | hard | Nutthanon Kadchapanan | 4-6 7-6(5) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.