American John Isner won his first ever Masters 1,000 title with a 6-7 (4-7) 6-4 6-4 victory over German Alexander Zverev in the Miami Open final.
In a nervous opening in Monday's clash, the first set went with serve before world number five Zverev edged the tie-break.
But 32-year-old Isner twice broke Zverev in the following sets and held his serve throughout the match.
Zverev, 20, saved five break points in the decider but crowd favourite Isner served his 18th ace to seal the title, according to a BBC report.
The world number 17 will now move back into the top 10 next week after the biggest win of his career.
"I couldn't have scripted this. I came into this tournament, I had won one ATP [World Tour] match all year and was playing very poorly," Isner said.
"I won my first match in three sets and that's how tennis goes - you start to gain a little confidence and next thing you know things start to roll your way."
