The roller-coaster ride that has been Nick Kyrgios’s tennis career careened into Washington’s Citi Open on Tuesday, but the thrill was short-lived, with the tournament’s defending champion ousted in 78 minutes.

Playing the role of spoiler was 107th-ranked American Mackenzie McDonald, 26, who missed the entire 2020 season with a serious hamstring injury and ..... go to Washinton Post for complete article