USA's Serena Williams signs autographs for fans after she and Spain's Carlos Alcaraz were defeated by Switzerland's Belinda Bencic and Italy's Flavio Cobolli in their mixed doubles tennis match at the 2026 US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on August 25, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

USA's Serena Williams signs autographs for fans after she and Spain's Carlos Alcaraz were defeated by Switzerland's Belinda Bencic and Italy's Flavio Cobolli in their mixed doubles tennis match at the 2026 US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on August 25, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

USA's Serena Williams and Spain's Carlos Alcaraz wave to the crowd after being defeated by Switzerland's Belinda Bencic and Italy's Flavio Cobolli in their mixed doubles tennis match at the 2026 US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on August 25, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Switzerland's Belinda Bencic and Italy's Flavio Cobolli meet USA's Serena Williams and Spain's Carlos Alcaraz at the net after defeating them in their mixed doubles tennis match at the 2026 US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on August 25, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Switzerland's Belinda Bencic and Italy's Flavio Cobolli celebrate defeaing USA's Serena Williams and Spain's Carlos Alcaraz during their mixed doubles tennis match at the 2026 US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on August 25, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Switzerland's Belinda Bencic and Italy's Flavio Cobolli celebrate defeaing USA's Serena Williams and Spain's Carlos Alcaraz during their mixed doubles tennis match at the 2026 US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on August 25, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

Serena Williams, of the United States, reacts during a mixed doubles match at the U.S. Open tennis championships, Tuesday, Aug. 25, 2026, in New York. (AP Photo/Yuki Iwamura)

Carlos Alcaraz, of Spain, left, and Serena Williams, of the United States, high-five during a mixed doubles match at the U.S. Open tennis championships, Tuesday, Aug. 25, 2026, in New York. (AP Photo/Yuki Iwamura)