Raphael Calzi defeated Alex Knaff 6-4 6-3 in the Germany F6 qualifying round of 32 on clay. The upset overturned the form book — Alex Knaff came in leading the head-to-head 2–0. Raphael Calzi claimed a first win over Alex Knaff in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-09-05 | M15 Hong Kong 3 | R16 | hard | Alex Knaff | 6-2 6-4 |
| 2023-06-29 | M25 Arlon 1 | R16 | clay | Alex Knaff | 6-2 6-1 |
Averages over each player's completed matches in the selected window (105 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About