Napaporn Tongsalee defeated Montinee Tangphong 6-4 6-2 in the Beijing 50K qualifying round on hard. The upset overturned the form book — Montinee Tangphong came in leading the head-to-head 2–1, but Napaporn Tongsalee had been the form player, winning 2 of their last 5 on hard. Napaporn Tongsalee narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-30 | Incheon 25K | R32 | hard | Napaporn Tongsalee | 6-2 3-6 6-1 |
| 2006-02-20 | St Paul MN 50K | R32 | hard | Montinee Tangphong | 6-7(4) 7-6(2) 7-6(5) |
| 2002-08-12 | Nakhon Ratchasima 10K | R16 | hard | Montinee Tangphong | 6-2 0-6 6-3 |