Marwan Zewar defeated Ronald Dueller 6-7 6-4 6-2 in the Egypt 1 1 round of 32 on clay. The upset overturned the form book — Ronald Dueller came in leading the head-to-head 2–0. Marwan Zewar claimed a first win over Ronald Dueller in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-02 | Egypt F2 | R32 | clay | Ronald Dueller | 6-3 6-2 |
| 1999-07-26 | Egypt F1 | QF | clay | Ronald Dueller | 6-2 6-4 |