WASHINGTON, DC - JULY 27: Ben Shelton of the United States and Diego Hidalgo of Ecuador shake hands with Christian Harrison of the United States and Neal Skupski of Great Britain after a men's doubles match 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 and Diego Hidalgo of Ecuador celebrate during a men's doubles match 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)

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 looks on before 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 sits on the bench before 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 looks on before 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 sits on the bench before 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 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)