Geronimo Degreef defeated Lucas Arnold Ker 6-7 6-4 6-3 in the Argentina 2 Masters 4 round of 16 on clay. The upset overturned the form book — Lucas Arnold Ker came in leading the head-to-head 2–0. Geronimo Degreef claimed a first win over Lucas Arnold Ker in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-07-17 | Argentina 2 Masters 2 | QF | clay | Lucas Arnold Ker | 7-5 6-3 |
| 1992-10-05 | Chile Masters 3 | R32 | clay | Lucas Arnold Ker | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.