Jannik Sinner, the reigning ATP World No. 1 and defending Wimbledon champion, has been missing from the 2026 US Open because of a knee injury. On the second Sunday of the tournament, he appeared at a location that felt both surprising and entirely predictable: the Italian Grand Prix, a Formula 1 race in Italy.

Sinner was not on a tennis court in New York. He was in the paddock, in the grandstands, and in the middle of a motorsport weekend that has long been part of his family's life. He arrived with his father, signed autographs for fans, and offered a brief but encouraging update on his knee.

Key facts at a glance

• Jannik Sinner is out of the 2026 US Open with a knee injury.
• He is the reigning ATP World No. 1 and the defending Wimbledon champion.
• He appeared at the Italian Grand Prix on the second Sunday of the US Open.
• He arrived with his father and signed autographs for fans.
• When asked about his knee, Sinner said it is fine.
• Matteo Berrettini also attended the F1 event and said Sinner is doing well.
• Berrettini lost in the US Open second round to Mariano Navone on September 2.
• Flavio Cobolli was upset in four sets by Alexander Blockx on Saturday.
• Luciano Darderi is the last Italian man in the US Open draw.
• Darderi faces top seed Alexander Zverev on Monday, September 7.

For much of the past several seasons, tennis fans had grown used to a familiar Grand Slam pattern: Sinner and Carlos Alcaraz meeting deep in tournaments, trading titles, and pushing each other to new levels. That rivalry became one of the defining stories of the sport. The 2026 season, however, has followed a very different script.

The Australian Open was the only major this year that unfolded according to that expected plan. Alcaraz then missed the French Open and Wimbledon with a wrist injury. Before the US Open, Sinner opted out because of his knee. The result is a Grand Slam season missing one or both of the sport's two brightest young stars for long stretches, a reality that has reshaped the men's draw and left fans wondering what might have been.

Sinner's absence from the US Open is especially significant because he has become one of the most reliable big-match players on hard courts. His rise to world No. 1 was built on clean ball striking, elite movement, and an uncanny ability to stay calm in the biggest moments. He has won major titles, beaten the best players in the world, and carried the expectations of Italian tennis and global tennis at the same time.

That is why his knee injury has been such a concern. A knee problem can affect every part of a player's game: movement, balance, serve, recovery, and confidence. Even a minor issue can linger. Sinner's decision to skip the US Open was a clear sign that he and his team were not willing to risk a more serious setback. When he said his knee is fine at the Italian Grand Prix, it was a short answer, but it was also the most positive update fans have received in weeks.

The setting made sense. The Italian Grand Prix originated in 1921 and has become one of the most storied events in motorsport. The Sinner family are known to be big Formula 1 fans. For an Italian athlete who has spent years under intense public scrutiny, a race weekend in Italy offers a rare combination: a high-energy event, a familiar cultural environment, and a chance to be a fan rather than the main attraction.

Sinner arrived with his dad and graciously signed autographs. He did not hold a press conference or provide a detailed medical timeline. That is consistent with his low-key personality. He would not use an F1 event to go into detail about his injury. He wanted to enjoy the race. For a player who is usually defined by his work on the court, the appearance was a reminder that he is also a young man with interests outside tennis.

Matteo Berrettini was also in attendance. Berrettini lost in the US Open second round on September 2 to Mariano Navone, a result that ended his singles run in New York. Instead of disappearing from the tennis conversation, he appeared at the F1 event and offered a brief look at Sinner's condition. Berrettini said all is well with Sinner, mentioning that they arrived together at the F1 event.

That detail matters. Berrettini and Sinner have shared plenty of moments as Italian tennis teammates and rivals. They have practiced together, competed against each other, and represented Italy in team events. Their careers have followed different arcs: Berrettini broke through first, reaching a Wimbledon final and becoming one of the faces of Italian tennis, while Sinner later surged to the top of the sport. Injuries have interrupted both players at different times, which may explain the empathy between them.

Their connection was visible in the past, including a 2024 Wimbledon encounter that drew attention from Italian fans around the world. On that day, Berrettini and Sinner met on one of the sport's biggest stages, with Sinner advancing in a match that showcased the depth of Italian men's tennis. The image of the two sharing a court at the All England Club became part of the larger story of Italy's rise in the sport.

While Sinner was in Italy, the US Open continued in New York. The men's draw had already produced its share of surprises. Many thought Flavio Cobolli would be the last Italian man standing in New York this year. Instead, he was upset in shocking four-set fashion on Saturday against Alexander Blockx. The loss removed one of Italy's most promising contenders from the tournament and shifted the focus to a less expected name.

That leaves Luciano Darderi as the last Italian in this year's tournament. Darderi faces top seed Alexander Zverev on Monday, September 7. It is a difficult assignment. Zverev, a former major finalist and one of the most consistent hard-court players of his generation, enters the match as the top seed and a favorite. Darderi will need to serve well, extend rallies, and handle the pressure of carrying Italian hopes in New York.

The matchup also highlights how quickly the tennis landscape can change. A few days ago, Cobolli was the Italian man many expected to make a deep run. Now Darderi, who may have entered the tournament with less attention, has a chance to make a statement. For Italian tennis, the moment is another example of the country's growing depth. Even without Sinner, Italy has players capable of competing in the second week of a Grand Slam.

Still, Sinner's absence looms over the tournament. He is not just another top player. He is the world No. 1, a Wimbledon champion, and one of the few athletes in tennis who can move the needle globally. When he is missing, the draw feels different. Television schedules change, ticket demand shifts, and opponents see an opportunity that would not otherwise exist.

The 2026 US Open has thus become a test of resilience for the men's field. With Alcaraz out of earlier majors and Sinner out of New York, other players have had a chance to step forward. Some have taken advantage. Others have stumbled. The second Sunday, traditionally one of the most exciting days of the tournament, arrived with a mix of breakout performances and unexpected exits.

For Sinner, the priority is recovery. A knee injury can be tricky. Some players return quickly; others need weeks or months. The fact that he described his knee as fine is encouraging, but it is not a full diagnosis. His team will likely monitor his progress carefully and decide when he is ready to return to training, then competition. Until then, every public appearance will be scrutinized for clues.

His visit to the Italian Grand Prix offered few medical details, but it did offer a glimpse of his state of mind. He was willing to appear in public, greet fans, and spend time at an event he enjoys. He was not hiding. He was not using a wheelchair or showing obvious signs of distress. For fans who have worried about his long-term health, that alone was reassuring.

The Italian Grand Prix itself is a celebration of speed, engineering, and Italian sporting passion. Held at Monza for much of its history, it is one of the fastest races on the Formula 1 calendar. The atmosphere is loud, colorful, and deeply Italian. Drivers and teams are treated like heroes, and the tifosi bring an intensity that matches any Grand Slam crowd. For Sinner, attending the race is not a random diversion. It is a return to a family passion.

That family connection adds a personal layer to the story. Sinner has often spoken about the support of his parents and the role they played in his development. Arriving with his father at the Italian Grand Prix was a reminder that behind the rankings and titles, there is a family unit that has helped him navigate the pressures of professional tennis. It also showed that even a world No. 1 needs time away from the sport.

The tennis world will continue without him for now. The US Open will produce a champion, and the ATP Tour will move on to the next events. But Sinner's health remains a central storyline for the remainder of the season and beyond. If his knee is truly fine, he could return soon. If not, his absence could extend and alter the race for year-end rankings and future Grand Slam seeding.

For now, the most concrete facts are simple. Sinner was out of the US Open. He appeared at the Italian Grand Prix. He arrived with his father and signed autographs. He said his knee is fine. Berrettini was with him and said all is well. Meanwhile, Darderi carries Italian hopes in New York against Zverev on Monday, September 7.

Source:MSN News