Lukas Lacko defeated Konstantin Don Gruber 7-5 4-6 6-0 in the Italy F32 round of 32 on clay. The upset overturned the form book — Konstantin Don Gruber came in leading the head-to-head 1–0. Lukas Lacko claimed a first win over Konstantin Don Gruber in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-05 | Austria F1 | R16 | clay | Konstantin Don Gruber | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.