Results from Sunday’s concluding singles matches in a first-round Davis Cup tie between United States and Switzerland at Birmingham, Alabama:

United States 5 Switzerland 0

Sam Querrey (USA) bt Adrien Bossel (SUI) 6-3, 7-5

Steve Johnson (USA) bt Antoine Bellier (SUI) 6-4, 6-3

Saturday’s doubles

Steve Johnson/Jack Sock (USA) bt Henri Laaksonen/Adrien Bossel (SUI) 7-6 (7/3), 6-3, 7-6 (7/5)

Friday’s singles

Jack Sock (USA) bt Marco Chiudinelli (SUI) 6-4, 6-3, 6-1

John Isner (USA) bt Henri Laaksonen (SUI) 4-6, 6-2, 6-2, 7-6 (7/1)