Brazil’s rising star Joao Fonseca’s game isn’t just about winning! It is about the way he adds poise to his playing style, showing that he rightly belongs on the big stage. At just eighteen, this ATP star is leaving a mark on the sport with a victory in the ATP Next Gen Finals. But it is not just the crowd that noticed Fonseca’s potential. A coach who has shaped some of the game’s brightest stars like Coco Gauff has stepped forward with a strong belief. As he compliments the Brazilian, he leaves a question in fans’ minds: Will his prediction turn right for the ATP star?

Fonseca was in the spotlight for a stunning performance in the Next Gen ATP Finals last season, capturing the title by defeating American Learner Tien in a nerve-wracking four-set battle. The Brazilian ATP star followed that up with another impressive victory at the Challenger Tournament in Canberra this season, overpowering the American, Ethan Quinn. But, Fonseca’s real breakthrough came when he qualified for his maiden Grand Slam, the 2025 Australian Open, and surprised the fraternity by overpowering the experienced Andrey Rublev by 7(7)-6(1), 6-3, 7(7)-6(5). Fonseca’s fearlessness and talent have drawn comparisons to Jannik Sinner and Carlos Alcaraz, marking him as a potential future top-ranked player to watch out for.

Among Fonseca’s growing list of admirers is Brad Gilbert, Coco Gauff’s former coach and ESPN analyst, who praised the young Brazilian star’s skills. Reflecting on Fonseca’s win over Rublev, Gilbert shared his thoughts on X, tweeting, “Joseca is the name I’m going with for now.” Highlighting Fonseca’s ability to thrive under pressure, this renowned coach added, “What a phenomenal last 2 points from Fonseca to take out Rubles. Really like what I’m seeing from Fonseca—such easy power off both sides and sneaky good serve. Definitely need to work on nickname ASAP.”

Interestingly, Gilbert didn’t stop there. He focused on Joao Fonseca’s top-tier potential, stating, “Fonseca’s level for 18, let alone any age, is simply off the charts 📊. His easy power and composure 👍😎✊—right now, his level is easily top 10. I said last month he’d finish 🔝 25; now I’m seeing year-end championships.” Such a high compliment from a veteran coach speaks volumes about Fonseca’s rapid growth and impression among the fraternity. But it is certainly not just Gilbert who is moved by Fonseca’s potential.

Jannik Sinner’s coach, Darren Cahill, also joined in the chorus of admiration. While covering the 2025 Australian Open as an ESPN analyst, Cahill revealed a prediction from his pupil, the ATP No. 1, Jannik Sinner. “I asked Jannik what ranking he thought Joao Fonseca would be at the end of the year, and he said, ‘in the top 25,’” Cahill revealed. Starting the season as ATP No. 113, this Rio de Janeiro-based player has set the stage for an extraordinary climb. Beyond Gilbert and Cahill, even some WTA legends have expressed their enthusiasm for Fonseca’s potential, further establishing his status as one of the most exciting prospects in the sport.

WTA legends praise Joao Fonseca, predict a great future for the Brazilian teenager

Following Gilbert’s tune, former Australian Open champion Lindsay Davenport had a great prediction for Fonseca. Witnessing his epic win against Rublev, which makes him the only teenager after Mario Ancic to defeat a Top Ten player in his first major tournament match, Davenport said, “He has that superstar quality, and he’s able to—so far!—handle all the pressure that comes along with it.”

After Davenport’s comment, Martina Navratilova also chimed in and complimented him. She believed the 18-year-old player got the best of both Jannik Sinner and Carlos Alcaraz, calling him a big contender for top ten player in the future. “He’s got that Alcaraz and Sinner quality where he can hit hard, and he can hit it harder. You can hear the gasps of the crowd reacting to the power that’s coming off his racquet,” said Navratilova. For every rising star, it is a dream to share the court with top-ranked players like Jannik Sinner or Carlos Alcaraz, who have more than multiple Slam titles in their bags. And after defeating Andrey Rublev in the first round, this 19-year-old ATP star admitted  to ATP.com, “I hope I can do the same or even better than what they have done and are doing and are going to do. I look forward to playing with them and I hope I can compete in big matches at Grand Slams. It is where I want to go.”

Joao Fonseca might have played only twenty matches so far in his professional career but he has already gained significant popularity in the sport. He is also the third highest-ranked Brazilian tennis player after Thiago Seyboth Wild and Thiago Monteiro. But this ATP star is  hungry.With stars in his eyes, he is working to improve continuously – and one day perhaps challenge his own idols. With an impressive start to the tournament, the fraternity remains certain he might fulfill his dream this time in Melbourne. Do you think Fonseca will be able to keep up with the fraternity’s expectations?