Lucas Arnold Ker defeated Gustavo Cavallaro 6-2 3-6 6-1 in the Argentina 3 Masters 3 qualifying round on clay. The upset overturned the form book — Gustavo Cavallaro came in leading the head-to-head 2–1, but Lucas Arnold Ker had been the form player, winning 5 of their last 10 on clay. Lucas Arnold Ker narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1995-08-05 | Argentina B Masters 4 | QF | clay | Gustavo Cavallaro | 6-2 6-3 |
| 1995-04-01 | Argentina 1 Masters 4 | R16 | clay | Gustavo Cavallaro | 6-2 1-0 |
| 1993-07-17 | Argentina 2 Masters 1 | R16 | clay | Lucas Arnold Ker | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.