The tennis community raised their eyebrows after watching 18-year-old Brazilian star Joao Fonseca in his first Australian Open. The younger qualifier upset Andrey Rublev, the ninth-ranked player globally,

Joao Fonseca definitively introduced himself to the world as the latest teen sensation in men’s tennis, upsetting No. 9 seed Andrey Rublev in the first round of the Australian Open.

Fonseca was part of the 2024 lineup alongside Fils and Luca Van Assche of France; Michelsen, eventual finalist Learner Tien and Nishesh Basavareddy of the U.S.; Jakub Mensik of the Czech Republic and Shang Juncheng of China, who also goes by his Americanized name, Jerry Shang.

Fonseca has long looked like a star-in-waiting. Under pressure in his first Grand Slam set, he delivered beyond those lofty expectations

Joao Fonseca has become the talk of the town in Melbourne after causing a big upset at the Australian Open. The 18-year-old qualifier stunned No. 9 seed Andrey Rublev in straight sets as he made his Grand Slam main draw debut on Tuesday.

Joao Fonseca definitively introduced himself to the world as the latest teen sensation in men's tennis on Tuesday night, upsetting No. 9 seed Andrey Rublev 7-6 (1), 6-3, 7-6 (5) in the first round of the Australian Open.

The Australian Open, one of tennis’ grandest stages, often serves as the launch pad for future stars. Though Joao Fonseca, a promising young talent, bowed out early in this year’s tournament, his performance and potential have sparked significant interest among fans and analysts alike.

Joao Fonseca's impressive Grand Slam debut at the Australian Open showcased the young Brazilian's potential despite his second-round defeat to Lorenzo Sonego. Praised by top players like Carlos Alcaraz,

Watch the match highlights between Joao Fonseca & Lorenzo Sonego in Round 2 of the 2025 Australian Open Men's Singles Tournament Tennis.