Leonardo Lavalle defeated Daniel Merkert 7-5 6-3 in the Mexico 3 Masters 3 qualifying round on carpet. The result followed the form book — Leonardo Lavalle came in leading the head-to-head 1–0. Leonardo Lavalle extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-09-12 | Mexico 3 Masters 1 | R16 | carpet | Leonardo Lavalle | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.