Who is Joao Fonseca? 18-year-old Brazilian wonderkid stuns Andrey Rublev at Australian Open - The qualifier defeated World No 9 Rublev on his grand slam debut to extend his winning run to 14 matches

Grand Slam giant killings do not come much more sizeable than Joao Fonseca's stunning straight sets victory over Andrey Rublev at the Australian Open.

Joao Fonseca, an 18-year-old Brazilian, defeated No. 9 seed Andrey Rublev in the first round of the Australian Open. This was Fonseca's debut in the main draw of a Grand Slam tournament. He won 7-6 (1),

Rublev could do little to stem the flow of brilliance across the net, with Fonseca winning 7-6(1) 6-3 7-6(5). Read more at straitstimes.com.

In a highly entertaining Australian Open first round match, 18-year-old Joao Fonseca defeated ninth ranked Andrey Rublev.

Rising Brazilian tennis star Joao Fonseca has made a stunning debut on the Grand Slam circuit, defeating Andrey Rublev at the 2025 Australian Open. This is Rublev's first opening-round defeat at Melbourne Park since 2019.

Teenage sensation Joao Fonseca announced himself on the big stage by knocking out ninth seed Andrey Rublev in the first round of the Australian Open. The 18-year-old Brazilian is the hottest young property in men’s tennis after winning the Next Gen ATP Finals for the best players aged 21 and under last month and then qualifying for the main draw of a grand slam for the first time here.

Joao Fonseca has been waiting for his chance to play on the biggest stages of tennis, and what a way to arrive. The 18-year-old qualifier upset world No.9 Andrey Rublev in straight sets to claim his maiden Grand Slam win.