Stefan Koubek defeated Agustin Calleri 6-3 7-6 7-6 in the Australian Open round of 64 on hard. The upset overturned the form book — Agustin Calleri came in leading the head-to-head 2–1, defending last year's round of 128. Stefan Koubek narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-07-30 | Sopot | R32 | clay | Stefan Koubek | 0-6 7-6(3) 7-5 |
| 2003-05-05 | Rome Masters | R64 | clay | Agustin Calleri | 6-2 6-2 |
| 2002-05-06 | Rome Masters | R64 | clay | Agustin Calleri | 6-2 7-6(4) |
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 (33 vs 51). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About