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

Joao Fonseca delivered what he described as a 'rude' response to Novak Djokovic 's comments after becoming the breakthrough star of the Australian Open. Fonseca delivered a sensational display to stun Andrey Rublev in straight sets, beating the world No. 9 7-6 (1), 6-3, 7-6 (5) in the opening round on Tuesday.

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.

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.

Backed by a raucous Brazilian contingent on Court 1573, Fonseca took the hour-long opener in the decider, eventually clinching set point at the fourth time of asking

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 been the talk of the tennis world and has now drawn high praise from 10-time Australian Open champion Novak Djokovic.

In his first-ever Grand Slam match, Fonseca defeated World No. 9 Andrey Rublev in straight sets: 7-6 (1), 6-3, 7-6 (5). The match was evenly contested, but Fonseca was dominant with his power and agility.