George Cosac defeated Adolf Musil 6-4 7-6 in the Czech Moravian Masters 2 qualifying round on carpet. The upset overturned the form book — Adolf Musil came in leading the head-to-head 1–0. George Cosac claimed a first win over Adolf Musil in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-10 | Yugoslavia F5 | QF | clay | Adolf Musil | 6-1 6-3 |