WASHINGTON — The surging American teens in women’s tennis now have a trophy to show for their breakout summer, after two of them, Coco Gauff and Caty McNally, claimed the doubles title at the Citi Open on Saturday.

Gauff, 15, and McNally, 17, dominated the fourth-seeded team of Maria Sanchez and Fanny Stollar, 6-2, 6-2, to claim the first WTA title for each in front of a capacity crowd on the tournament’s second court.

“For me, and I think for both of us, it means a lot,” said Gauff, whose given name is Cori. “Obviously we want to do well in singles, but I think we just love competing in general, so whether it’s singles or doubles, we want to win no matter what. So I think that we really get as nervous as we do in doubles as we do in singles because we just want to make the other one proud.”

McNally had struggled with a hip injury during a loss in her singles semifinal earlier Saturday, but she rallied alongside Gauff, who lost in the first round of singles on Tuesday, to close out their second title together. Their first title came in their lone previous partnership, at last year’s United States Open junior tournament, in which they did not lose a set.