Pieter Calitz defeated Louis Vosloo 6-2 4-6 7-5 in the South Africa Masters 1 qualifying round on hard. The upset overturned the form book — Louis Vosloo came in leading the head-to-head 2–0, but Pieter Calitz had been the form player, winning 5 of their last 8 on hard. Pieter Calitz claimed a first win over Louis Vosloo in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-11-29 | South Africa F2 | R32 | hard | Louis Vosloo | 6-4 6-7(9) 6-4 |
| 1999-10-16 | South Africa Masters 3 | SF | hard | Louis Vosloo | 6-0 6-4 |