Ben Shelton stuns Carlos Alcaraz in four-hour 28-minute US Open classic, books semifinal with Frances Tiafoe

In the early hours of September 9, 2026 in New York, the clock above Arthur Ashe Stadium hit 3:33 a.m. Ben Shelton had just won the final point to defeat Carlos Alcaraz 6-7(5), 6-1, 6-3, 1-6, 7-6(10/7) and reach the US Open semifinals. The quarterfinal lasted 4 hours 28 minutes and became the latest-finishing match in the history of the Flushing Meadows hard-court Grand Slam. The previous record, 2:50 a.m., was set by Alcaraz himself in 2026. This time, the defending champion could not find a way through. Shelton knelt after the 10-7 tiebreak, a symbol of a sleepless night for American tennis. The 23-year-old said on court: “For me, it is all about the people in the stands. Coaches, my team, family, friends, or the whole city of New York that stayed awake with me until 3 a.m. The chants of ‘USA’ until the last point were the launch pad for my win.” He also praised Alcaraz: “Carlos is one of the greatest champions at 23. He produces incredible shots. This was the most fun match I have ever played.” The context made the result even more stunning. Alcaraz arrived in New York after four months off with injury, but he was still the clear favorite. He had lost only one set on the way to the quarterfinals and carried an 18-match Grand Slam winning streak from the 2026 US Open through the 2026 Australian Open. That Melbourne title made him the youngest man in the Open Era to complete a Career Grand Slam. Shelton’s resume was built differently. The 23-year-old American entered the match with a 13-2 record on the North American hard courts this summer, including his first ATP Masters 1000 title in Montreal. His overall 2026 record stood at 38 wins and 13 losses. He was not defending a title at Flushing Meadows. He was building a launch pad. Alcaraz won the first set 7-6(5), using his return game to neutralize Shelton’s biggest weapon. But the match shifted at the start of the second set. Shelton served with more variety, stayed patient in rallies and took the set 6-1. He followed with a 6-3 third set, breaking at crucial moments while Alcaraz struggled to find rhythm. The champion responded with a 6-1 fourth set, sending the match into a fifth set. The fifth set became a test of nerve. Neither player could dominate on serve, and the set went to a decisive tiebreak. Shelton played the bigger points more cleanly, winning 10-7 after 4 hours 28 minutes. He lost only one tiebreak all match, but it was Alcaraz who blinked in the last one. A contrarian reading is necessary. Was Alcaraz physically broken? The evidence does not say so. He just won the fourth set 6-1 and was still moving well in the fifth. The problem was his execution in the biggest moments. Shelton did not out-rally the world number one; he out-played him inside the small margins of the final tiebreak. Shelton also had a crowd that stayed until 3:33 a.m. That energy is hard to quantify, yet in a match this close it can provide the last five percent. Shelton’s tactics were equally important: he returned deep, made Alcaraz run, and avoided unnecessary risks in the deciding set. Alcaraz now leaves New York after a streak of 18 consecutive Grand Slam wins. His attempt to win three straight US Open titles is over. Still, at 23, he already owns a Career Grand Slam and will have many more chances. Shelton will face Frances Tiafoe, the 11th seed, in the semifinals on September 11. Shelton leads the head-to-head 3-1, but the two Americans have split their two previous matches at Flushing Meadows. One of them will reach a first Grand Slam final. For Shelton, the question is whether he can repeat the same controlled aggression that ended Alcaraz’s reign.