Riccardo Balzerani defeated Johannes Haerteis 4-6 6-2 6-4 in the L'Aquila CH round of 32 on clay. The upset overturned the form book — Johannes Haerteis came in leading the head-to-head 1–0. Riccardo Balzerani claimed a first win over Johannes Haerteis in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-20 | M25 Hamburg 1 | R32 | hard | Johannes Haerteis | 6-3 6-4 |
Averages over each player's completed matches in the selected window (200 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