Emma Raducana's first-round win over Loisa Chiricio in Washington was the start of her defense of her US Open title later.
Within 87 minutes Emma won 6-4 6-2, taking her first North American win of the hardcourt season.
And then Emma will face Colombia's Camila Osorio in the second round of the Washington Open.
On the other hand, Dan Evans secured a third-half position with a 6-1 6-2 win to then face America's Taylor Fritz or Australia's Alexei Popyrin.
In another match, England's Jack Draper lost to Russia's Andrey Rublev. And Wimbledon Runner-up Nick Kyrgios beat American Marcos Giron 6-3 6-2.