

Lukas Klein defeated Fabian Marozsan 6-4 7-6 in the Alicante CH semi-final on clay. The upset overturned the form book — Fabian Marozsan came in ranked #63. Lukas Klein extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-07-21 | M15 Piestany 2 | F | clay | Lukas Klein | 6-1 4-6 6-1 |
| 2016-10-03 | Hungary F8 | Q16 | clay | Lukas Klein | 6-7(8) 6-0 6-3 |
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
Marozsan F.: 6 days rest · 1 match, 29 games (7d). Higher means fresher. About
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