Juan Manuel Cerundolo defeated Federico Delbonis 6-4 6-4 in the Santiago qualifying round 2 on clay. The upset overturned the form book — Federico Delbonis came in leading the head-to-head 1–0, defending last year's round of 16. Juan Manuel Cerundolo claimed a first win over Federico Delbonis in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-03-01 | Buenos Aires | R32 | clay | Federico Delbonis | 6-4 7-6 |
Averages over each player's completed matches in the selected window (199 vs 41). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Cerundolo J.: 2 days rest · 3 matches, 65 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