Carlos Alcaraz once left Ben Shelton taken aback after calling a violation on himself during their French Open clash.

Ben Shelton stunned Carlos Alcaraz in a five-set epic to storm into the US Open semi-finals on a late night in New York.

When the end came, at 3:33 a.m., it was Shelton roaring to the faithful who had stayed behind, with a 7-6(5), 6-1, 6-3, 1-6, 7-6(10-7) win sealed by a 146 mph ace.

Defending champion Carlos Alcaraz forces a deciding fifth set against eighth seed Ben Shelton in the early hours of the morning in New York - follow live.

At the end, when five riveting sets and one agonizingly tight tiebreak were over — and when the latest-finishing match in U.S. Open history had concluded — Ben Shelton was not the only player smiling.

A large crowd remained captivated deep into the night as a modern classic unfolded over an unpredictable four hours and 28 minutes on Arthur Ashe Stadium.