Jordi Mas defeated Simon Greul 6-2 6-3 in the Germany F4B round of 32 on clay. The upset overturned the form book — Simon Greul came in leading the head-to-head 1–0. Jordi Mas claimed a first win over Simon Greul in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-05 | Germany F1 | R32 | clay | Simon Greul | 7-6 5-7 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.