Alex de Minaur has pulled off a major upset…

The 24-year-old Uruguayan & Spanish Australian tennis player used a superb defense and a dominant serve to beat Novak Djokovic 6-4, 6-4 in the quarterfinals of the United Cup on Wednesday.

Djokovic continued to struggle with his wrist injury as Australia stunned Serbia with a 3-0 win.

Djokovic, who has had a problem with his right wrist during the tournament, found a way past Jiri Lehecka in Serbia’s previous Group E match against the Czech Republic.

But Djokovic, ranked No. 1 in the world, was clearly in discomfort against world No. 12 de Minaur and was twice treated by the physio during the first set.

It was Djokovic’s first defeat in Australia since he lost his quarterfinal at the Australian Open in 2018.

Ajla Tomljanovic followed up by giving Australia an unassailable 2-0 lead when she won 6-1, 6-1 against Natalija Stevanovic, who had stepped in for Olga Danilovic. Matthew Ebden and Storm Hunter then completed the rout by combining for a 6-3, 6-3 triumph over Serbian mixed doubles duo Dejana Radanovic and Nikola Ćaćić.

“It’s extra special,” de Minaur said as Australia sealed its maiden appearance in the semifinals. “Novak is an unbelievable competitor and what he’s done for the sport is pretty special. It feels surreal, amazing, and I’m very happy to do it here in Perth.

“When you go up against Novak you have to go out and enjoy it and back yourself, and no matter what keep fighting until the end. Today was my day and I’m happy that I was able to get the win.”