Andy Murray and his brother Jamie won their doubles contest against Juan Martin del Potro and Leonardo Mayer to ensure the Davis Cup semi-final between Great Britain and Argentine remained alive.
The Murrays won 6-1, 3-6, 6-4, 6-4 to reduce the deficit to 2-1 heading into Sunday's deciding two singles matches against the Argentines.
On Friday, Del Potro and Guido Pella had given the South Americans a surprise 2-0 lead by defeating Andy Murray and Kyle Edmund respectively.
That meant Saturday's doubles contest was a must win match, and the Murray brothers did not disappoint.
— Davis Cup (@DavisCup) September 17, 2016
The victory appeared as if it might be an easy one when the British pair raced through the first set in 27 minutes courtesy of two breaks, but the Argentines hit back to level the scores thanks to a solitary break of serve in the second game of the second set.
Del Potro and Mayer then found themselves a break up in the third and serving for a 5-3 lead, only for the Murrays to hit back with consecutive breaks to go two sets to one up.
The fourth set stayed on serve until the 10th game, when the Murrays pounced, breaking to love to seal the four-set victory in just under three hours.
Murray will be expected to beat Pella when they meet in the first singles match on Sunday, but then Del Potro will have a golden opportunity to clinch the tie when he faces British No 2 Edmund.
In the second semi-final, Croatia will take a 2-1 lead into the final day against France.
Locked at 1-1 heading into Saturday's doubles contest, it was the Croatian pair of Marin Cilic and Ivan Dodig who gave their country the all-important advantage heading into Sunday by defeating Nicolas Mahut and Pierre-Hugues Herbert 7-6 (8-6), 5-7, 7-6 (8-6), 6-3 in front of their home fans.