Diego Nargiso defeated Jan Siemerink 6-0 7-6 in the Ostrava quarter-final on carpet. The upset overturned the form book — Jan Siemerink came in leading the head-to-head 2–0. Diego Nargiso claimed a first win over Jan Siemerink in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-03-09 | Copenhagen | R16 | carpet | Jan Siemerink | 6-4 4-6 6-3 |
| 1996-01-15 | Australian Open | R64 | hard | Jan Siemerink | 1-6 5-7 6-2 7-6(8) 6-1 |
Averages over each player's completed matches in the selected window (31 vs 199). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About