Guillaume Marx defeated Carlos Gomez Diaz 6-2 6-1 in the Spain 2 Masters 3 round of 16 on clay. Guillaume Marx extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-30 | France 2 Masters 2 | R32 | clay | Guillaume Marx | 7-6 3-6 6-3 |
| 1991-07-22 | France 2 Masters 4 | R32 | clay | Carlos Gomez Diaz | 6-3 5-7 7-6 |