Dominik Hrbaty defeated Jan Siemerink 6-1 6-3 in the Estoril round of 16 on clay. The upset overturned the form book — Jan Siemerink came in leading the head-to-head 2–0. Dominik Hrbaty claimed a first win over Jan Siemerink in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-31 | US Open | R64 | hard | Jan Siemerink | 6-4 6-3 6-4 |
| 1998-01-05 | Adelaide | R32 | hard | Jan Siemerink | 6-3 6-7(5) 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 30). ATP, WTA & Challenger.