The U.S. Open witnessed a fleeting moment of tennis magic as Serena Williams and Carlos Alcaraz teamed up in mixed doubles, only to be knocked out in the quarterfinals by Belinda Bencic and Flavio Cobolli, 5-4 (4), 4-1, on Tuesday. The defeat ended a short but nostalgic chapter for the Grand Slam tournament, which had welcomed Williams back to Flushing Meadows for the first time in four years and Alcaraz after a four-month injury hiatus.

Williams, now 44, had not competed in New York since 2022, and her return alongside the 23-year-old defending men's singles champion generated immense buzz. Their first-round match against Erin Routliffe and Lloyd Glasspool, which they won 5-3, 4-1, was a celebration inside Arthur Ashe Stadium. Fans roared for the duo, and Williams later admitted, "I never expected to be back on this court. I never thought this would happen." Alcaraz, wearing a sleeve on his right wrist, showed signs of rust after missing the French Open and Wimbledon due to a wrist injury. "I double-faulted on the first point," he said. "I was really, really nervous. I was out for four months ... I almost forget how it feels."

In the quarterfinal, the pair struggled to find rhythm. They dropped the first set in a tiebreaker after Bencic and Cobolli capitalized on early breaks. The second set was even more lopsided, with the opposing team dominating. Bencic, who later reflected on the experience, said, "I don’t know how I landed on this court to play Carlos and Serena. It was an honor to play." Cobolli, before the match, had called Williams and Alcaraz "the queen of tennis and the king of now."

Despite the loss, Williams displayed glimpses of her prime, hitting powerful groundstrokes and sharp volleys that reminded fans of her peak years. She even carried Alcaraz early in the first round, covering the court with the same intensity she showed in her singles career. The question now is whether she will extend her stay at the tournament by entering women's doubles with her sister Venus. Williams has not indicated any plans to play singles.

Alcaraz, ranked third in the world, acknowledged that his lengthy absence affected his performance. The competitive rust was evident, but he remains a top contender in men's singles when healthy. The mixed doubles competition this year features a new format with sets to four games, a tiebreaker at 4-all, and a 10-point match tiebreaker instead of a third set. Only the final, scheduled for Wednesday night, will use traditional six-game sets. The winners will receive $1 million, part of the tournament's effort to attract elite players.

For Williams, the match was a poignant reminder of her enduring legacy. She won the U.S. Open mixed doubles title in 1998 with Max Mirnyi, and her return to the court, even in a supporting role, stirred emotions among fans. Alcaraz, meanwhile, will look to regroup and focus on his singles campaign. The duo's brief partnership, though short-lived, encapsulated the spirit of the U.S. Open—a stage where legends of the past and present can collide, even if only for a few games.