The United States is one win away from advancing. Bob and Mike Bryan, the world's No. 1 ranked doubles team, will take on Brazil's Marcelo Melo and Bruno Soares on Saturday, followed by Sunday's reverse singles.
It was only the third time the Bryan brothers had dropped a Davis Cup match. It was just the second time that they had dropped a five-set match in ATP competition. Their only other five-set defeat was in a 1999 match at Wimbledon.
John Isner is set to return from a knee injury and will play the No. 1 singles spot for the U.S. team against Brazil in the first round of Davis Cup World Group matches.