March 24 (Reuters) - World number ⁠two Jannik Sinner fought back in the second set ⁠against American Alex Michelsen to seal a 7-5 7-6(4) ‌victory and reach the Miami Open quarter-finals on Tuesday, extending his record run of consecutive sets won at ATP Masters 1000 events.

Sinner edged a tight opening ​set before facing a sterner test in ⁠the second, where he ⁠trailed 5-2 as Michelsen raised his level from the baseline.