Frances Tiafoe reached a maiden Grand Slam semi-final by dispatching Andrey Rublev in straight sets in front of a home crowd at the US Open.
Tiafoe, who stunned Rafael Nadal in the previous round, will play Spain's Carlos Alcaraz or Italian Jannik Sinner in the last four.
They meet in the final men's singles quarter-final (around 01:30 BST).
"This is wild, this is crazy. I had the biggest win of my life 48 hours ago. To back it up, it's tough to turn the page, but I did, and now I'm in the semis," Tiafoe said.