This Afternoon, Live Audio Coverage of the US OPEN: It’s the men’s semi-finals that are on center stage.

NEW YORK (AP) — About 20 minutes after Frances Tiafoe earned the first trip to the U.S. Open semifinals by an American man since 2006, he met up in an Arthur Ashe Stadium foyer with a host of friends, Washington Wizards All-Star guard Bradley Beal among them.

Everyone traded hearty hugs and huge smiles. Tiafoe shouted, “Let’s pose for a dope photo!” and they obliged. As the nine-person line stood together, someone yelled, “Throw up a ‘Dub!’” so Tiafoe and others formed a “W” — as in “Win” — by joining thumbs and index fingers on both hands. Tiafoe’s girlfriend ran through the nearby double doors, jumped into his arms, gave him a kiss, then wiped away lipstick from his mouth.

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Most assuredly a showman, and someone striving for years for this sort of success on big stages, Tiafoe sure is enjoying the ride, as are his pals, his parents and the partisan fans, who last celebrated a Grand Slam trophy for a man from the United States two decades ago.

Meanwhile, in a match never seemed like it was would not end. Should not end, one might say. Carlos Alcaraz and Jannik Sinner, two of the brightest young stars of men’s tennis, traded shots of the highest quality and countless momentum swings across five sterling sets for 5 hours, 15 minutes until Alcaraz finally won the last point at 2:50 a.m. on Thursday, the latest finish in U.S. Open history.

It was “only” a quarterfinal, no trophy at stake, yet was as taut a thriller as this year’s tournament has produced or, likely, will, a tour de force of big cuts on the full sprint and plenty of guts, concluding as a 6-3, 6-7 (7), 6-7 (0), 7-5, 6-3 victory for the No. 3-seeded Alcaraz, a 19-year-old from Spain.

“Honestly,” said Alcaraz, who saved a match point in the fourth set, “I still don’t know how I did it.”

He also used words such as “unbelievable” and “amazing.” No hyperbole there.

“This one will hurt for quite a while,” said No. 11 Sinner, a 21-year-old from Italy. “But tomorrow, I will wake up — or today, I will wake up — trying to somehow (take away) only the positives.”