Christian Ruud defeated Daniel Vacek 6-1 6-3 in the Prague quarter-final on clay. The upset overturned the form book — Daniel Vacek came in leading the head-to-head 1–0. Christian Ruud claimed a first win over Daniel Vacek in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-23 | Long Island | R16 | hard | Daniel Vacek | 6-3 6-3 |
Averages over each player's completed matches in the selected window (128 vs 180). 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