Los Angeles: Sofia Kenin and Bethanie Mattek-Sands defeated Jelena Ostapenko and Anastasija Sevastova 6-4, 6-0 in a deciding doubles as the USA survived a Saturday scare to beat unheralded Latvia 3-2 and reach the Fed Cup finals. New Australian Open champion Kenin and Mattek-Sands ensured the USA reached the finals in Budapest from April 14-19 after both Serena Williams and Kenin had been stunned in the singles as Latvia levelled the qualifier 2-2 in Seattle.

Sevastova had earlier inflicted a shock first Fed Cup singles loss on Williams 7-6 (7/5), 3-6, 7-6 (7/4). "We were playing in the USA so obviously the crowd was going to be for Serena. I just tried to give it my best," Sevastova said of her win at the Angel of the Wings arena. Williams, the 23-time Grand Slam champion, bounced back from losing the first set by cruising through the second set in 33 minutes, but she was outplayed on the big points in the second tiebreak.