The 19-year-old Mensik became the second-youngest titlist in tournament history behind Carlos Alcaraz, who lifted the trophy in 2022 as an 18-year-old.

Jakub Mensik used his length to shrink the court, erasing Novak Djokovic's ability to find winners in a shock upset for his first career tennis title Sunday at the Miami Open.

Novak Djokovic denied 100th ATP Tour title by Jakub Mensik in Miami Open final - Djokovic has not won a title on tour since the ATP Finals in 2023

The start of the Miami Open men's final between Novak Djokovic and unseeded 19-year-old Jakub Mensuk on Sunday at Hard Rock Stadium was delayed 5½ hours from its 3 p.m. start time.

New Miami Open champion Jakub Mensik revealed that he signed papers to withdraw from the tournament, but a referee being on their lunchbreak was the reason why he played on and ended up victorious. The Czech 19-year-old defeated Novak Djokovic 7-6 (4), 7-6 (4) to claim an almighty scalp in Florida.

Heavy rain poured down on Hard Rock Stadium Sunday afternoon and there was lightning in the area, delaying the start of the Miami Open men’s final between 24-time Grand Slam champion Novak Djokovic and 19-year-old Czech newcomer Jakub Mensik.

Novak Djokovic is one win away from a 100th career singles title after breezing past Grigor Dimitrov to reach the Miami Open final.