Joao Fonseca has already done something even the biggest stars struggle to achieve

At the start of the 2025 season, there was a lot of hype around one particular name. Joao Fonseca was the next big thing ready to rise through the ranks and challenge the best players in the sport. In his second full year on the ATP Tour, he is currently proving why he is the real deal.

The hype and talent have been there from a young age and is now starting to be converted onto the big stage more regularly. He was looked at as a Brazilian trailblazer in the sport, becoming the first from his country to finish the season as world No. 1 in the junior rankings back in 2023. He was one of the biggest junior talents in the world, winning the US Open boys’ singles title in that same year.

His transition to the ATP Tour began at a young age, getting any experience he could through qualifying and wildcards. It would take some time before he made some inroads in this competitive realm, but the signs were there with Challenger success ahead of capping off the year by winning the Next Gen ATP Finals.

That was the green light he needed to move onto bigger things. His Grand Slam debut came with a first top 10 win while accelerating his progress at senior level with a first ATP title in South America at the tender age of 18. He continued to improve throughout the year while patiently waiting for that stepping stone to more success. Doubling his title tally, he ended the year well inside the top 30 after just one year on the Tour.

2026 offered a new chance for him to push on and achieve more in the sport. A maiden Grand Slam quarter-final while defeating some of the best players in the sport. As other young talents rise around him, he is in desperate need of proving why he is the pick of the bunch as he continues his ascend with the sky the limit for this Brazilian wonderkid.

Tennis was in his veins from an early age, first hitting a ball at the age of two. His dad was among the first to see this talent, along with a yoga teacher in Rio de Janeiro as they saw the glistening potential first hand. “When he was two, we were like, ‘This boy is different,’ Christiano told ATPTour.com in an interview. “I remember that my yoga teacher came here and started playing with the ball with Joao and he said to me, ‘This boy is different. He has much more reflexes and coordination than the average.' Very young, we knew he was different.”

As he grew up, the hunger continued to grow as well did his motivation, specifically when going to watch his home Rio Open event. Little did he know that he would be one of the headline acts there in the future. Having a front row seat to watch Rafael Nadal in 2014 was a special memory, but it was in fact his bitter rival Roger Federer who he dearly looked up to in his youth.

He would grace the court as a teenager with countless amounts of potential which had started to be picked up by a wider tennis audience, although only a small one back then. His first real moment in the spotlight came not in the singles, but in the doubles alongside Alexander Blockx. The duo reached the Australian Open boys’ final but would come out second best. He was just 16-years-old when he won the prestigious U18 junior grass-court tournament at Roehampton before backing it up with a run to the quarter-finals at Wimbledon.

He managed to better that and then some at the US Open, defeating another notable name in the form of Learner Tien to win the Boys’ title at Flushing Meadows. He culminated the year as the World No.1 in the junior rankings and named the 2023 junior champion by the ITF.

Even before much of that happened, Fonseca had already made his ATP Tour debut. At the age of 16, he was handed a wildcard to the Rio Open. From watching his heroes on the clay courts of his home city to now being the centre of attention. A connection between the fans and himself would start to brew from this point following a straight sets defeat to Alex Molcan.

A fully fledged member of the Challenger Tour he presided on this circuit for much of the next two years. He reached a first semi-final right at the start of the year in Buenos Aires. He had reached two quarter-finals 2022 and 2023, but this was new ground being trod on. He returned to Rio ranked as the World No. 655, but left making his top 350 debut. Wins over Arthur Fils and Cristian Garin put him on the tennis map as he exited in the quarter-finals to Mariano Navone in three sets. He was the first player to win an ATP match after being born in 2006 and was the second youngest quarter-finalist, just behind a certain Alexander Zverev in elite company. He was the first South American to defeat a top 50 player since the ATP Rankings were first introduced and was the youngest player ranked inside the top 350.

This was a significant part of his career, and something that stems his growth. Now turning fully professional, he was handed another wildcard in Santiago but could not get on the board. In doing so, he cut ties with the University of Virgina, deciding not to go through the College route. "It was an incredibly tough decision for me and my family as I have been dreaming about living a college life in Charlottesville, playing the sport that l love with a wonderful team and coach, but, in the last months, professional tennis called me in a way that I simply couldn't say no," he said at the time.

The ranking breakthrough continued to come. He was getting accustomed to featuring on the ATP Tour, making his decision to commit to pro tennis a good one in hindsight. Another quarter-final this time coming in the Tiriac Open was followed by his Masters 1000 debut, which came in Madrid, as well did a first ever win at that level against Alex Michelsen. He continued to add more achievements to his CV with a first and long awaited Challenger title coming in Lexington. He was the youngest Challenger winner of 2024 and did not even drop a set. By this time, he had reached a career high of World No.166.

Fonseca went on a 14-match winning streak between 2025 and 2026. This started among the best youngsters in the world at the Next Gen ATP Finals. The likes of Fils, Mensik, and Tien were all involved. All of them are currently enjoying brilliant stints on the ATP Tour, but none were able to hush the inform Fonseca who, despite being the lowest ranked play, won the tournament. A second Challenger title started 2025 with a bang as he qualified for the Australian Open.

A major debut which had so much hype and potential around it. Facing off against the World No.9 Andrey Rublev, Fonseca was impenetrable. The Russian fell in straight sets, and a star was born. He would exit in the second round in five sets against Lorenzo Sonego before travelling back to South America where a first ATP title was down the pipeline. Most places around the world Fonseca is the most popular man on the court, but against Francisco Cerundolo on Argentine soil, he was not the favourite to win. Nevertheless, he upset the number five seed and the crowd to become the first ever Brazilian ATP Tour champion and the youngest South American to claim glory.

There is a pattern with many of these successes in whatever category he is in. This is that it is usually followed by a list of accomplishments and records smashed. A trailblazer for Brazilian tennis, he was also matching and beating records set by some of the greats. Tennis can be a cruel sport, and fans forget quickly the great things achieved if there is any setbacks. The standards have now been elevated, and he had to match them.

He instantly came back down to earth with a first round exit in the Rio Open. A huge disappointment for the World No.68. His Sunshine swing was capped by a third singles Challenger title in between second and third round exits at Indian Wells and Miami to Jack Draper and Alex de Minaur, another reality check against the best in the world. In Phoenix, he toppled Alexander Bublik with a couple of tiebreaks to keep that winning feeling.

A bit of a quiet and even barren spell was next for him. His French Open and Wimbledon debut campaigns ended in the third round as he climbed into the top 50. Progress at this stage was not all about winning titles and defeating top 10 players, but slowly plugging away and gaining experience in the biggest arenas.

The Davis Cup, for example. No higher honour than representing your country. After his first foray at Flushing Meadows, the 18-year-old picked up a brace of wins over the Greek duo of Stefanos Sakellaridis and most notably Stefanos Tsitsipas to gift Brazil a valuable win. He then became the youngest player to feature in the Laver Cup, stunning Flavio Cobolli in straight sets to help Team World win the exhibition.

A sinus infection hampered his involvement in the Asian swing. Having an important team around you while a good and mature head on your shoulders is crucial when coming to make important decisions in tennis. He must have been eager to make the trip over to Asia and compete there, but he held fire and decided to rest and recover for a return to Europe.

This was an inspired decision that would reap a huge reward. There was definitely moments of luck with a walkover against Jakub Mensik and Denis Shapovalov retiring in the Swiss Indoors, but Fonseca made that luck. Now 19, he blasted into a second ATP final and continued his 100% winning streak with Alejandro Davidovich Fokina not given a single chance. A first ATP 500 title was earned. One of the highest regarded moments in Brazilian tennis with just Carlos Alcaraz younger when lifting an ATP 500 title. He reached a career high ranking of 24th at the start of November, and is yet to top it.

It may be quick to forget Fonseca's woes at the start of the year. A first round defeat in the Australian Open was was followed by a lacklustre title defence in Buenos Aires. He had to fight back the emotions in this part of the season, not producing the tennis he is capable of with a second round defeat in Rio de Janeiro a bitter pill to swallow. He did not leave his head hanging for long, winning a first ATP doubles title on home soil alongside compatriot Marcelo Melo.

His Sunshine swing made headlines for who he faced. At Indian Wells, he took on Jannik Sinner and gave the Italian a lot to think about. Three set points were missed to take the lead as Sinner won a brace of tiebreak in a huge 'what if.' He then had the immense prospect of tackling Carlos Alcaraz in Miami. The pair had played in an exhibition at the end of 2025, and like that result the seven-time Grand Slam champion took the spoils 6-4, 6-4. Aside from putting on a popular spectacle enjoyed by many tennis fans around the world, these matches showcased Fonseca's natural ability to keep up with the two best players currently competing. To top it off, he then faced the number three seed Alexander Zverev in the very next tournament at the Monte-Carlo Masters. His best Masters 1000 run to date as he departed in the quarter-finals.

A talented clay player, his results were a bit underwhelming ahead of Roland Garros. With players such as Rafael Jodar and Fils making a huge impression, Fonseca's name was not getting mentioned as much. This altered significantly in a well-remembered session on Philippe Chatrier. 24-time Grand Slam champion Novak Djokovic would take on Fonseca for the first time. A 20-year age gap was between the two competitors, and the class showed on the Serbians side of the court as he took a 2-0 lead. Seemingly down and out, Fonseca rallied and ticked off three sets in a row to take out one of the title favourites and questionably the GOAT of tennis. He backed this up with a win over two-time finalist Casper Ruud, in a feat that should not go unnoticed, before Mensik toppled him in straight sets at the last-eight. However, all the attention was on that Djokovic win. The first teenager to defeat him at a major event, Fonseca continues to prove himself as a special talent.

Now at the current day, he has recently been dumped out of the Canadian Open following reigning champion Ben Shelton seeing him off in two. There will be setbacks and low points in the rest of his career, there is no doubting that, but it is all about how he reacts to them. The telling signs are that Fonseca has a brilliant mentality match by a terrific support base that regularly follows him around the world. Compared to Alexandra Eala on the WTA Tour with her rowdy Philippines contingent normally by her side, that extra support will prove to be a huge boost in the future with the effects this will have on Brazilian tennis possibly unprecedented.

The question is no longer whether Fonseca has the talent to become a star. He has already shown enough to answer that. The real question is how far that talent can take him.