Herbert Wiltschnig defeated Valentin Sanon 2-6 6-2 6-3 in the Central America Masters 1 round of 16 on clay. The upset overturned the form book — Valentin Sanon came in leading the head-to-head 2–0, but Herbert Wiltschnig had been the form player, winning 1 of their last 4 on clay. Herbert Wiltschnig claimed a first win over Valentin Sanon in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-10-10 | Nigeria F5 | QF | hard | Valentin Sanon | 6-3 6-1 |
| 2004-01-12 | El Salvador F1 | R32 | clay | Valentin Sanon | 6-2 7-6(5) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.