Jannik Sinner beat Czech Jiri Lehecka 6-4 6-4 in a rain-hit Miami Open final on Sunday to become the first man to complete the coveted 'Sunshine Double' without ​dropping a set.

The Italian world number two won 92 percent of his first-serve points ‌and saved all three break points he faced en route to a victory that extended his string of Masters 1000 matches without dropping a set to 17.

"We did a lot of work to be ​in this position, so I'm really, really happy, and I'm also happy to ​go back home now," Sinner said after the match.

"Making here the Sunshine ⁠Double here for the first time, it's incredible. It's something I would have never ​thought, because it's also difficult to achieve, and yeah, we made it somehow, so I'm ​very happy."

Sinner, who played around with a soccer ball ahead of a match that was delayed by about 90 minutes due to rain, broke early for a 3-1 lead and then leaned on his ​serve to close out the opening set with a hold at love.

The rain returned during ​the opening game of the second set, forcing players off the court for about 90 minutes, during ‌which ⁠Sinner again kept loose with a soccer ball that he passed around with members of his team.

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World number 22 Lehecka, playing in his first Masters 1000 final, fought off five break points over a pair of service games in the second set followed by a ​hold at love to ​go 4-3 up ⁠before Sinner took over.

Sinner made good on his sixth break point opportunity of the second set to pull ahead 5-4 and then ​closed it out on his serve when he sent a forehand ​volley to the ⁠open court on his first championship point.

Sinner is the first man since Roger Federer in 2017 to win the Indian Wells and Miami titles back-to-back, a feat known as the 'Sunshine Double' ⁠given ​the tournaments' respective locations in California and Florida.

By doing ​so, Sinner joins a club that, in addition to Federer, also includes Novak Djokovic, Andre Agassi, Marcelo Rios, Pete ​Sampras, Michael Chang and Jim Courier.