Alexander Zverev returns a shot against Lloyd Harris in their quarterfinal match on Day 10.
Alexander Zverev hits 43 winners and breaks four times to make back-to-back semifinals in New York.
Harris, from South Africa, in action early in the match.
Zverev, the 2020 US Open finalist, was just two points away from his maiden Grand Slam title against Austrian Dominic Thiem and is eager for another shot at his first major crown.
24-year-old Harris is ranked No. 46 in the world.
Zverev is trying to become only the second man to win Olympic gold and the US Open in the same season. Brit Andy Murray accomplished both in 2012.
Harris upset No. 25 Karen Khachanov, No. 7 Denis Shapovalov, and No. 22 Reilly Opelka en route to the quarterfinals.
Zverev faces the winner of sixth seed Matteo Berrettini of Italy and world No. 1 Novak Djokovic, who close the evening session in Arthur Ashe Stadium.
Alexander Zverev serves in shadow.
