Aleksandar Vukic defeated Gabriel Diallo 6-3 6-4 in the Australian Open qualifying round 1 on hard. The upset overturned the form book — Gabriel Diallo came in ranked #93. Aleksandar Vukic extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-09 | s Hertogenbosch | R32 | grass | Gabriel Diallo | 7-5 7-6(2) |
| 2023-01-16 | Australian Open | Q1 | hard | Aleksandar Vukic | 6-3 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
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (198 vs 199). ATP, WTA & Challenger.