
Guilherme Clezar defeated Thiago Monteiro 6-3 6-3 in the Milan CH round of 32 on clay. The upset overturned the form book — Thiago Monteiro came in leading the head-to-head 2–1. Guilherme Clezar narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-02-26 | Sao Paulo | R32 | clay | Guilherme Clezar | 6-3 1-6 7-5 |
| 2012-05-14 | Brazil F10 | R16 | clay | Thiago Monteiro | 6-7(3) 6-3 7-6(3) |
| 2011-10-03 | Brazil F33 | R32 | clay | Thiago Monteiro | 1-6 6-3 6-4 |
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About