Mark Joachim defeated Juan Giner 6-4 6-1 in the Spain 4 Masters 2 qualifying round on clay. The upset overturned the form book — Juan Giner came in leading the head-to-head 2–0. Mark Joachim claimed a first win over Juan Giner in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-09 | Spain 4 Masters 4 | F | clay | Juan Giner | 6-1 6-4 |
| 1998-04-03 | Spain 4 Masters 3 | R32 | clay | Juan Giner | 4-6 6-1 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.