Despite the straight-set scoreline of 7-5, 7-6, the match was far from easy for Sinner. Michelsen pushed him hard, especially in the second set, where the American raced to a 5-2 lead. However, Sinner showed his class and composure, fighting back to force a tiebreak and eventually sealing the win with a powerful serve.“I feel like I served very well in important moments and that helped me out, especially in the tough moments,” Sinner said. “But today was not easy — I played a night match yesterday and today in the daytime, so the conditions were very different.”With this victory, Sinner remains on course for the “Sunshine Double,” having already won the Indian Wells title earlier.

Upsets and key results in Miami

In other matches, Frances Tiafoe advanced to the quarter-finals and will now face Sinner. One of the biggest surprises came from Spain’s young qualifier Martin Landaluce, who defeated Sebastian Korda in a thrilling three-set match.Landaluce, who had struggled for wins earlier this season, dedicated his victory to his late grandmother, saying, “She would have been 101 last week, and she passed away a few months ago. I wanted to give her the victory.”Elsewhere, Jiri Lehecka knocked out Taylor Fritz, while Tommy Paul, Arthur Fils, Francisco Cerundolo, and Alexander Zverev also progressed, setting up an exciting quarter-final lineup in Miami.