Nina Duebbers defeated Laura Bao 6-1 6-2 in the Lenzerheide 25K round of 16 on clay. The upset overturned the form book — Laura Bao came in leading the head-to-head 2–1. Nina Duebbers narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-06-14 | Lenzerheide 10K | QF | clay | Laura Bao | 2-6 6-2 6-4 |
| 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 |