MIAMI, March 25 — World number three Jannik Sinner survived a scare from Dutchman Tallon Griekspoor as he moved into the fourth round of the Miami Open with a 5-7, 7-5, 6-1 victory on Sunday.

The second-seed Italian, a two-time finalist in Miami, struggled against Griekspoor’s power play in the first set but turned the contest around after a rain break at 3-3 in the second set.