Glenn Knox defeated Thiemo Maier 4-6 6-4 6-4 in the Australia F4 round of 16 on grass. The upset overturned the form book — Thiemo Maier came in leading the head-to-head 1–0. Glenn Knox claimed a first win over Thiemo Maier in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-02 | Egypt F2 | R32 | clay | Thiemo Maier | 4-6 7-6 6-2 |