

Joao Fonseca defeated Jakub Mensik 3-4 4-3 4-3 3-4 4-3 in the Next Gen Finals round robin on hard. The upset overturned the form book — Jakub Mensik came in ranked #16, leading the head-to-head 1–0. Joao Fonseca claimed a first win over Jakub Mensik in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-06-02 | Roland Garros | QF | clay | Jakub Mensik | 6-4 6-3 |
Averages over each player's completed matches in the selected window (144 vs 140). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Fonseca J.: 3 days rest · 1 match, 23 games (7d) · Mensik J.: 2 days rest · 2 matches, 52 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 hard field, opponent-adjusted over 52 weeks). About