Since World Group play began in 1995, the United States is 0-10 after falling behind 0-2.
The quarterfinal winner will face the Spain-Czech Republic winner in the semifinals in April.
“In the third set, I changed a little bit my game because in the second set, I was playing too much cross-court,” Knapp said. “I changed a little bit up and I think this was the difference.”
In the second match, the 84th-ranked Giorgi dominated the 37th-ranked Keys.
“She was playing really well today, and there’s not much I can do when someone’s playing like that,” Keys said.
Copyright © 2019 The Washington Times, LLC.