Jack Sock and Steve Johnson prevailed in a three-set doubles match Saturday as the United States took a 3-0 lead over Switzerland to clinch a spot in the Davis Cup quarterfinals.
Sock and Johnson posted a 7-6 (3), 6-3, 7-6 (5) victory over Henri Laaksonen and Adrien Bossel in the match at Birmingham, Ala.
The United States faces Australia in April. The Aussies advanced with a 4-1 victory over the Czech Republic.
Sock and Johnson were forced into two tiebreakers but remained in control of the match as their long partnership helped them fight off the charge of the two Swiss players.
"We played together a bunch of times in the past, so just once we get going we get the familiarity back with one another," Johnson said. "Everything kind of clicked toward the end or we got it going, so just keep it rolling."
The two countries finish play Sunday with two singles matches.
"We will be ready to play (Sunday) for sure, even though this thing is decided," United States captain Jim Courier said. "I think I can speak for all of us when I say we're anxious to get down there and battle on. We really want to get out to the semifinals and see what we can do this year."
The Australians certainly have their sights on the United States. The Americans hold a 26-20 edge in their Davis Cup battles.
"We really want to make a good run this year and we've given ourselves an opportunity to do that now," Australian captain Lleyton Hewitt said. "We know it's going to get a lot tougher along the way. We have a good team going forward and we're going to look forward to this next quarterfinal."