Andrei Cherkasov defeated Daniel Vacek 6-3 7-6 in the Tokyo round of 64 on hard. The upset overturned the form book — Daniel Vacek came in leading the head-to-head 2–0. Andrei Cherkasov claimed a first win over Daniel Vacek in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-26 | Kitzbuhel | R32 | clay | Daniel Vacek | 6-3 0-6 7-5 |
| 1996-08-12 | New Haven | R32 | hard | Daniel Vacek | 6-4 6-4 |
Averages over each player's completed matches in the selected window (27 vs 178). 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