Septi Mende defeated Sandy Gumulya 6-4 6-3 in the Nakhon Ratchasima 10K round of 32 on hard. The upset overturned the form book — Sandy Gumulya came in leading the head-to-head 2–0. Septi Mende claimed a first win over Sandy Gumulya in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-08 | Tarakan 10K | R16 | hard | Sandy Gumulya | 6-3 6-2 |
| 2004-09-20 | Jakarta 3 10K | QF | hard | Sandy Gumulya | 6-0 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.