Laura Bao defeated Nina Duebbers 2-6 6-2 6-4 in the Lenzerheide 10K qualifying round on clay. The upset overturned the form book — Nina Duebbers came in leading the head-to-head 2–1, but Laura Bao had been the form player, winning 2 of their last 6 on clay. Laura Bao narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-06-18 | Lenzerheide 25K | R16 | clay | Nina Duebbers | 6-1 6-2 |
| 1999-03-01 | Buchen 10K | R32 | carpet | Nina Duebbers | 6-4 3-6 6-3 |
| 1998-11-10 | Bossonnens 10K | SF | carpet | Laura Bao | 6-2 6-2 |