WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States addresses the crowd after her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Mubadala Citi DC Open Chairman Mark Tin with champion Coco Gauff and runner-up Maria Sakkara at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States battles Maria Sakkari of Greece during the championship of the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Maria Sakkari of Greece waves to the crowd after the championship of the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Mubadala Citi DC Open Chairman, Mark Ein speaks to the crowd following the championship at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
WASHINGTON, DC - AUGUST 6: Coco Gauff of the United States celebrates her victory over Maria Sakkari of Greece at the Mubadala Citi DC Open at the Rock Creek Park Tennis Center on August 6, 2023 in Washington, D.C. (Photo by Joe Glorioso/All-Pro Reels)
Kei Nishikori celebrates after he beat John Isner 4-6, 6-4, 6-4, in a men's singles final match at the Citi Open on Sunday at the Rock Creek Park Tennis Center. (Associated Press)