Overview
- Sinner advanced 7-6 (6), 7-6 (4) in a one-hour, 58-minute thriller decided by two tiebreaks.
- Fonseca led 6-3 with three set points in the opening tiebreak before Sinner reeled off five straight points to steal the set.
- Sinner was broken at love while serving for the match at 5-3 in the second set but closed it out in the tiebreak with a forehand return winner on his first match point.
- The contest showcased power-first patterns, with 36 combined forehand winners, Sinner producing only three backhand winners, roughly a third of serves going unreturned, and both players winning over half their second-serve points.
- Next up, Sinner faces American Learner Tien, who reached his maiden Masters 1000 quarterfinal after saving two match points against Alejandro Davidovich Fokina.