Filip Horansky defeated Mario Vilella Martinez 7-6 6-3 in the ATP Rio de Janeiro qualifying round 1 on clay. The upset overturned the form book — Mario Vilella Martinez came in leading the head-to-head 2–0. Filip Horansky claimed a first win over Mario Vilella Martinez in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-31 | Roland Garros | Q2 | clay | Mario Vilella Martinez | 6-2 6-3 |
| 2021-05-26 | Roland Garros | Q64 | clay | Mario Vilella Martinez | 6-2 6-3 |
Averages over each player's completed matches in the selected window (131 vs 76). 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