The brothers Andy and Jamie Murray led Britain to a hard-fought 4-6, 6-3, 6-4, 6-7 (6), 6-4 victory in Glasgow over Lleyton Hewitt and Sam Groth of Australia on Saturday for a 2-1 lead in their Davis Cup semifinal.
In the other semifinal, Leonardo Mayer and Carlos Berlocq gave Argentina a 2-1 lead over Belgium in Brussels, 6-2, 7-6 (2), 5-7, 7-6 (5), after a tense doubles match against Steve Darcis and Ruben Bemelmans that lasted four hours.
In a World Group playoff, a straightforward doubles win for Steve Johnson and Sam Querrey lifted the United States to a 2-1 lead over host Uzbekistan in Tashkent.