Jakub Mensik denied Novak Djokovic his 100th tour-level title with a superb straight-sets win at the Miami Open.

The teenager, who was just 10 months old when Djokovic won his first title in 2006, came out on top with a 7-6 (7-4) 7-6 (7-4) victory in just over two hours to claim his first ATP Tour title.

The final was delayed by almost six hours due to heavy rain, but Mensik came out strong when play got under way, breaking Djokovic on his first service game as he stormed into a 3-0 lead.

However, Djokovic, who was struggling with an eye infection, fought back after going 4-1 down, putting together a three-game winning streak of his own to claw back to level terms.

The Serb then twice served to love to force a tie-break, but Mensik found his edge with big serves, hitting two aces as he took the lead.

The second set was a cagey affair with neither player able to force a break, though Mensik came closest, with Djokovic having to defend two break points in the fifth game.

But with another tie-break needed to separate the pair, Mensik's power prevailed once more, and Djokovic went long on return to hand him the win.

MENSIK: THE MASTER OF MIAMI

First ATP Tour title, may as well make that a Masters 1000… @miamiopen | #MiamiOpen pic.twitter.com/tySyjox9n4

— ATP Tour (@atptour) March 31, 2025

"To be honest, I don't know what to say. It feels incredible, obviously," Mensik said in his on-court interview.

"It was probably the biggest day of my life, and I did super, which I'm really glad [about], to show the performance and keep the nerves outside of the court before the match.

"I feel just super happy, and I think that the feelings will come later."

Djokovic, meanwhile, refused to use his eye problem as an excuse, saying: "I didn't feel my greatest on the court, but it is what it is. Nothing to take away from his victory.

"I really prefer not to talk about - there are quite a few things, but I prefer not to... just congratulate him. That's it. I don't want to sound like I'm giving excuses here for my loss."

Data Debrief: Overturning the odds

Djokovic had not dropped a set to reach the final, but he had no answers for Mensik in Sunday's showpiece at the Hard Rock Stadium.

Though it should not have been a surprise as Mensik has proven his worth in tie-breaks; since the format's introduction in 1990, Mensik is the first player to win 7+ tie-breaks en route to tournament victory at an ATP Masters 1000 event, and only the second player outright after John Isner.

Since the tournament's inauguration in 1985, Mensik (#54) has become the lowest-ranked player to win the men's singles title at the Miami Open.

He is also the second teenager outside the ATP's top 20 to win an ATP Masters 1000 event, after Michael Chang (#24, Toronto 1990).