By Janina Nuno Rios

NEW YORK, Sept 10 - Home fans will have an all-American U.S. Open semi-final to savour on Friday when Ben Shelton and Frances Tiafoe meet for a place in the final, while top seed Alexander Zverev renews a long-running rivalry with resurgent Russian Karen Khachanov.

Shelton and Tiafoe will take the Arthur Ashe Stadium spotlight after both produced dramatic quarter-final victories.

Eighth seed Shelton, the highest-ranked American in the draw, claimed the biggest win of his career by stunning defending champion Carlos Alcaraz in a five-set thriller that finished at 3:33 a.m., the latest conclusion in U.S. Open history.

The victory was Shelton's first against the seven-time Grand Slam champion and made him only the second American man in the last two decades to beat a top-three opponent at the U.S. Open, after his next opponent Tiafoe defeated Spanish great Rafael Nadal on his way to the 2022 semi-finals.