German Puentes defeated Mark Joachim 6-2 7-5 in the Spain 6 2 round of 32 on clay. The upset overturned the form book — Mark Joachim came in leading the head-to-head 1–0. German Puentes claimed a first win over Mark Joachim in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-03 | Spain 4 Masters 2 | F | clay | Mark Joachim | 6-4 6-4 |