

Alexander Zverev defeated Hugo Dellien 7-5 3-6 6-3 in the Geneva quarter-final on clay. The result followed the form book — Alexander Zverev came in ranked #3, leading the head-to-head 1–0. Alexander Zverev extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-10 | Rome Masters | R32 | clay | Alexander Zverev | 6-2 6-2 |
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 clay field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (199 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Zverev A.: 2 days rest · 3 matches, 103 games (7d) · Dellien H.: 1 day rest · 4 matches, 96 games (7d). Higher means fresher. About