Canadian teenager Denis Shapovalov upset British number two Kyle Edmund with a terrific performance at the Aegon Championships in London.
Shapovalov, 18, won 7-6 (7-4) 4-6 6-4 at Queen's Club and goes on to face Czech seventh seed Tomas Berdych.
This was the biggest win of the Wimbledon junior champion's burgeoning career, and a setback for Edmund, 22.
The Briton is ranked 146 places higher than Shapovalov at 47th and reached the quarter-finals at Queen's last year.
"It's definitely one of the biggest wins," the Canadian wildcard told BBC Sport.
"Kyle is an unbelievable player.