19-year-old Joao Fonseca is a generational talent. Or you could soon go bankrupt. Say it. His brief tenure on the men’s tennis tour served as a case study in the madness of an early career cycle of hype and disappointment. What’s clear is where he stands at this moment after his spine-tingling 7-6(6), 7-6(4) loss to Jannik Sinner on Tuesday night in Indian Wells. Fonseca is an intoxicating top-level prodigy and one of the best forehands in the world, who could challenge the Sinner-Alcaraz regime more powerfully than players a decade his senior.
Almost exactly three years ago, Fonseca was a 16-year-old playing his first tour-level match at his home tournament, the ATP 500 in Rio de Janeiro. (He was annihilated. I didn’t even remember that match happening.) The next year he returned to Rio with a wild card and some baby pats and lost to world no. 36 Arthur Fils and world no. 88 Cristian Garin and thwarted Fonseca’s bizarre plans to play college tennis at the University of Virginia. His future lay in the professional game. At the time, I compared him favorably to Jannik Sinner of the same age and predicted he would be in the top ten by the time he turns 20. By the end of the 2024 season, Fonseca had climbed hundreds of rankings and was just short of the U.S. Open main draw. They then lost their final qualifying match to an enthusiastic professional Brazilian crowd. Expectations grew even higher.
As much as it’s possible for an 18-year-old to have a “non-dominant” season at the highest level of professional tennis, I think Fonseca’s 2025 fits that description. On paper, the accomplishments were unreal for green players: a challenger title, a level 250 title, and a level 500 title. But judging by the flair he showed in his best games and the ease with which he played in high-pressure scenarios, he seemed capable of doing more. For example, reaching the second week of a Slam or being in the top 20 of the rankings, both of which narrowly eluded him. His movement and conditioning still haven’t matched his level of ball-striking, but this could easily be explained by his physical immaturity, and it wasn’t until last month that my own predictions for his future finally took a dim turn. After Fonseca’s early loss in Buenos Aires, he and his team revealed that he was born with lumbar lordosis, a back condition that requires careful management, and that he suffered a stress fracture in his lower back five years ago. Some of his physical flaws may now be seen in a new, more concerning light.
But I think I’m feeling fine now. Fonseca’s movements will probably not be confused with the slippery elasticity of Jannik Sinner or the quick twitching of Carlos Alcaraz. But he’s moving enough to release a ridiculous forehand. As analyst Hugh Clarke points out, tennis is a “moving activity”. and “Striking sport”; Fonseca’s striking is unrealistic enough to offset other deficiencies, as was the case with past sluggers like Juan Martin del Potro. Incredibly pure shot-making at full stretch can equate to slightly superior movement in terms of functionality. A player might reach the ball a step earlier, or reach for the ball and time it too well, and it doesn’t matter. That’s what I think of when I look at Fonseca now. In Indian Wells, he won in the fourth round, fresh off each. With wins over 23rd and 16th seeds Karen Khachanov and Tommy Paul, both veterans have consistently established themselves at the top of the tour and have served as useful benchmarks against which to measure better talent.
In yesterday’s match against Sinner, Fonseca had never played against him or Alcaraz, the current two tyrants of the ATP, the winner of nine consecutive major titles and the reason all ATP experts are reduced to a talent scouting game. Who else can keep up with these two, barring the occasional Novak Djokovic? All players in the age range between Sincaraj and Djokovic were languishing. The search had to continue in the lower ranks. 20-year-old big server Jakub Mensik entered this group directly with a shock loss to Sinner in Doha. Tien, a 20-year-old learner, didn’t beat them, but he is quickly improving with a fluid, powerful and tactically clean game. Who else?
Put Fonseca’s name back in the mix. He lost Tuesday’s game, but his performance cemented his place among the true challengers. Looking at Fonseca’s forehand again, it would be hard to argue that he shouldn’t be at the top of the list. This is one of the scariest shots in the world, not just purely in terms of speed and weight, but also because of how quickly he can reset the point where things aren’t going his way. This allows Fonseca to continue to be attacked even when the courts suggest otherwise. It is truly a shocking sight to see. Frankly, it’s a bit slow and the teenager being dragged wide by the doubles goal hits his forehand so hard that it hurts the world’s number two player.
Sinner is a superb defender who is gifted at maintaining a strong base with his legs while making crab-like runs along the baseline, but few players can force Sinner to display these skills on a consistent basis. To scramble, Sinner has to lose control of the rally, which he rarely does. Because he’s the best pure baseline rally player in the world. That (one of many reasons) is why Alcaraz is essential to the current state of tennis, and Fonseca has proven that he has the talent to make even Sinner work hard every time he strikes with his odd forehand. At points where Sinner was unable to move Fonseca around the court, it looked like a mirror match, with both players committed to getting off the baseline and cutting through the middle of the court, with Sinner trying to turn rallies into backhand exchanges where he maintained the edge, and Fonseca trying to turn every ball into a forehand. Watching court scenes has a therapeutic effect on my brain.
Like all the best matches, this one was won by a very narrow margin. Fonseca had three set points in the first set tiebreak, but was handled by Sinner for the next five points. But he was right there in the second set and fought back to extend the match when Sinner served at 5-4. He grew bolder with his ball-striking until the set ended in another tie-break.
There is a lot more room for Fonseca to improve as a player, but starting from scratch at this level is incredible. I can’t imagine him sliding into a corner and hitting an open stance scorcher. This technique is synonymous with Djokovic and has since been mastered by Sincaraz. I don’t think he’ll be able to chase down a short ball with the foot speed of those three players. That’s not the nature of his athletic ability. Such skills seem essential to winning majors in the modern ecosystem, and for the most part I still believe the flaws in these moves put a limit on Fonseca’s potential. But if he could hit the ball better than anyone alive, that ceiling probably wouldn’t exist.
