British number one Emma Raducanu's preparations to defend her US Open title got under way with a first-round win over Louisa Chirico in Washington.
The 19-year-old came through 6-4 6-2 in 87 minutes to earn her first victory of the North American hard court season.
"It definitely feels really good to get a win here in DC," said Raducanu.
"After not playing for quite a bit after Wimbledon or many matches at all this year, I think it's a really nice feeling just to get on the board."
The world number 10 will face Colombia's Camila Osorio in the Washington Open second round as she continues to build up to the year's final Grand Slam, which begins on 29 August.