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.

No. 112-ranked Joao Fonseca will meet No. 55 Lorenzo Sonego in the Australian Open Round of 64 on Wednesday, January 15.In his last time out, Fonseca was defeated by Eliot Spizzirri 6-7, 7-6, 4-6

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.

Brazilian teen Joao Fonseca was one of the first surprises of the 2025 Australian Open, after he defeated ninth seed Andrey Rublev. Check out all you need to know about this young talent.

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.

The qualifier, who reached his first grand slam main draw, faces ninth seed Andrey Rublev in the opening round

Novak Djokovic sees a bit of himself as a young player in rising teenager Joao Fonseca and particularly welcomed the prospect of a top talent coming out of Brazil.