Santiago Ventura defeated Mark Joachim 6-3 7-6 in the Spain 4 2 round of 32 on clay. The upset overturned the form book — Mark Joachim came in leading the head-to-head 2–1. Santiago Ventura narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-09 | Spain 4 Masters 3 | QF | clay | Santiago Ventura | 6-4 6-4 |
| 1998-04-03 | Spain 4 Masters 1 | R16 | clay | Mark Joachim | 6-2 6-3 |
| 1998-04-03 | Spain 4 Masters 4 | R32 | clay | Mark Joachim | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.