NEW YORK, NEW YORK - AUGUST 30: Carlos Alcaraz of Spain serves 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 forehand volley 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 stretches to play a forehand 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 stretches to play a forehand 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 with his coach Samuel Lopez during a practice session 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 with Stan Wawrinka of Switzerland after a practice session 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)