Kazakhstan's Elena Rybakina hits a return to USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

Kazakhstan's Elena Rybakina hits a return to USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

Kazakhstan's Elena Rybakina hits a return to USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

Kazakhstan's Elena Rybakina hits a return to USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

Kazakhstan's Elena Rybakina waves to the crowd after defeating USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

(L/R) Kazakhstan's Elena Rybakina shakes hands with USA's Thea Frodin after Rybakina defeated Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

Kazakhstan's Elena Rybakina serves to USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

Kazakhstan's Elena Rybakina waves to the crowd after defeating USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)