NEW YORK, NEW YORK - SEPTEMBER 02: Marta Kostyuk of Ukraine reacts against Sloane Stephens of the United States during their Women's Singles Second Round match on Day Four of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 02, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 02: Sloane Stephens of the United States returns a shot against Marta Kostyuk of Ukraine during their Women's Singles Second Round match on Day Four of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 02, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

USA's Ben Shelton serves to Poland's Hubert Hurkacz during their men's singles second round tennis match against on day four of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 2, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

USA's Ben Shelton serves to Poland's Hubert Hurkacz during their men's singles second round tennis match against on day four of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 2, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Ukraine's Marta Kostyuk hits a return to USA's Sloane Stephens during their women's singles second round tennis match on day four of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 2, 2026. (Photo by KENA BETANCUR / AFP via Getty Images)

Poland's Hubert Hurkacz hits a return to USA's Ben Shelton during their men's singles second round tennis match against on day four of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 2, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Romania's Sorana Cirstea follows through on a serve to France's Diane Parry during their women's singles second round tennis match on day four of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 2, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Poland's Hubert Hurkacz hits a return to USA's Ben Shelton during their men's singles second round tennis match against on day four of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 2, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)