Andy and Jamie Murray kept alive Great Britain's hopes of retaining the Davis Cup with a four-set win over Argentina in the semi-final doubles.
The Scottish brothers beat Juan Martin del Potro and Leonardo Mayer 6-1 3-6 6-4 6-4 to cut Argentina's lead to 2-1 in the best-of-five tie in Glasgow.
Andy Murray and either Kyle Edmund or Dan Evans must win singles matches on Sunday to give Britain victory.
The winners of the tie will face France or Croatia in the final in November.
Andy Murray had been expected to play in Saturday's doubles with Britain on the verge of defeat, but it was a surprise to see Del Potro back on court after the pair's five-hour-seven-minute match on Friday.