Britain's Andy and Jamie Murray beat Australia's Lleyton Hewitt and Sam Groth to open a 2-1 lead in their Davis Cup semi-final in Glasgow.
A brilliant five-set match was won 4-6 6-3 6-4 6-7 (6-8) 6-4 in just under four hours in front of a partisan crowd.
If Andy Murray beats Australian number one Bernard Tomic in Sunday's opening reverse singles, Britain will be through to a first final since 1978.
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Details of the BBC's live coverage of the Davis Cup semi-final between Great Britain and Australia in Glasgow can be found here.