Danielle Harmsen defeated Stephanie Vongsouthi 3-6 6-3 6-1 in the Prague 50K round of 32 on clay. The result followed the form book — Danielle Harmsen came in leading the head-to-head 2–0. Danielle Harmsen extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-03-29 | Antalya 10K | QF | clay | Danielle Harmsen | 6-4 6-4 |
| 2006-06-26 | Heerhugowaard 10K | R16 | clay | Danielle Harmsen | 6-0 7-5 |