Ricardo Schlachter defeated Martin Vassallo Arguello 7-5 6-3 in the Paraguay F2 qualifying round on clay. The result followed the form book — Ricardo Schlachter came in leading the head-to-head 1–0. Ricardo Schlachter extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-19 | Uruguay F1 | R32 | clay | Ricardo Schlachter | 6-0 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.