WASHINGTON, DC - JULY 27: Madison Keys of the United States returns a shot during a women's singles match against Liudmila Samsonova on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Liudmila Samsonova reacts during a women's singles match against Madison Keys of the United States on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Liudmila Samsonova reacts during a women's singles match against Madison Keys of the United States on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Madison Keys of the United States reacts during a women's singles match against Liudmila Samsonova on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Madison Keys of the United States returns a shot during a women's singles match against Liudmila Samsonova on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Kei Nishikori of Japan reacts during a men's singles match against Shang Juncheng of China on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Kei Nishikori of Japan reacts during a men's singles match against Shang Juncheng of China on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)

WASHINGTON, DC - JULY 27: Ben Shelton of the United States reacts while playing a men's doubles match with Diego Hidalgo of Ecuador against Christian Harrison of the United States and Neal Skupski of Great Britain on day one of the Mubadala Citi DC Open 2026 at William H.G. FitzGerald Tennis Center on July 27, 2026 in Washington, DC. (Photo by Emilee Chinn/Getty Images)