NEW YORK NEW YORK - AUGUST 30: Marta Kostyuk of Ukraine reacts against Storm hunter of Australia during their Women's Singles First Round match on Day One of the 2026 US Open at USTA Billie Jean King National Tennis Center on August 30, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Caleb Bowlin/Getty Images)

NEW YORK NEW YORK - AUGUST 30: Marta Kostyuk of Ukraine reacts against Storm hunter of Australia during their Women's Singles First Round match on Day One of the 2026 US Open at USTA Billie Jean King National Tennis Center on August 30, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Caleb Bowlin/Getty Images)

NEW YORK NEW YORK - AUGUST 30: Marta Kostyuk of Ukraine reacts against Storm hunter of Australia during their Women's Singles First Round match on Day One of the 2026 US Open at USTA Billie Jean King National Tennis Center on August 30, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Caleb Bowlin/Getty Images)

NEW YORK, NEW YORK - AUGUST 30: Fans of Carlos Alcaraz of Spain display a message on a banner during a practice session with Stan Wawrinka of Switzerland before his first round match at USTA Billie Jean King National Tennis Center on August 30, 2026 in New York City. (Photo by Clive Brunskill/Getty Images)

NEW YORK, NEW YORK - AUGUST 30: Carlos Alcaraz of Spain plays a backhand during a practice session with Stan Wawrinka of Switzerland before his first round match at USTA Billie Jean King National Tennis Center on August 30, 2026 in New York City. (Photo by Clive Brunskill/Getty Images)

NEW YORK, NEW YORK - AUGUST 30: Carlos Alcaraz of Spain plays a backhand during a practice session with Stan Wawrinka of Switzerland before his first round match at USTA Billie Jean King National Tennis Center on August 30, 2026 in New York City. (Photo by Clive Brunskill/Getty Images)

NEW YORK, NEW YORK - AUGUST 30: Carlos Alcaraz of Spain plays a backhand during a practice session with Stan Wawrinka of Switzerland before his first round match at USTA Billie Jean King National Tennis Center on August 30, 2026 in New York City. (Photo by Clive Brunskill/Getty Images)

NEW YORK, NEW YORK - AUGUST 30: Carlos Alcaraz of Spain plays a backhand during a practice session with Stan Wawrinka of Switzerland before his first round match at USTA Billie Jean King National Tennis Center on August 30, 2026 in New York City. (Photo by Clive Brunskill/Getty Images)