U.S. Open door is wide open, and an American man must walk through it and win the title

American men's tennis has run out of excuses.

World No. 1 Jannik Sinner withdrew from the U.S. Open prior to the tournament with a knee injury. Then, Novak Djokovic lost in the first round.

Finally, in a stunning upset, Ben Shelton sent defending champion Carlos Alcaraz home after a five-set battle that ended at 3:33 a.m. Wednesday morning.

BEN SHELTON TAKES DOWN CARLOS ALCARAZ TO EARN THE BIGGEST WIN OF HIS CAREER IN LATEST US OPEN MATCH EVER

Now Shelton and Frances Tiafoe will meet in the semifinals on Friday...