Sam Querrey beat Thiago Alves 4-6, 6-3, 6-4, 7-6 (3) to give the United States a 3-2 victory over Brazil in their Davis Cup match on Feb. 3 at Jacksonville Veterans Memorial Arena.
The U.S. nearly squandered a 2-0 lead after losses by Bob and Mike Bryan in doubles on Feb. 2 and John Isner in reverse singles earlier Feb. 3.
The U.S. will host Serbia in the next round in April.
Earlier Sunday afternoon, Isner extended his drought in five-set Davis Cup matches, losing to Thomaz Bellucci and allowing the Brazilians to level the matchup 2-2 against the United States. Bellucci beat Isner 2-6, 6-4, 6-7 (7), 6-4, 6-3.
Isner fell to 0-4 in Davis Cup matches pushed to five sets. He is recovering from a bone bruise in his right knee that he suffered in early January. Isner fell to 4-10 in five-set matches as a pro, according to USTA officials.