Andy and Jamie Murray have ensured that Great Britain still remain in with a chance of retaining the Davis Cup.
The Scottish brothers claimed a four-set victory over Argentinian doubles pairing Juan Martin del Potro and Leonardo Mayer, winning 6-1 3-6 6-4 6-4.
Great Britain were trailing 2-0 going into Saturday’s match but now remain on course to defend their Davis Cup crown.
Andy and either Kyle Edmund or Dan Evans must win singles matches on Sunday to give Britain victory and set up a showdown with France or Croatia in November’s final.
GB captain Leon Smith feels there are plenty of reason to be positive heading into Sunday.
Smith said: “They’ve given us so many good moments together as a team and we needed them. As soon as we heard Juan Martin was coming in they showed their cards, that they wanted to finish the tie today.
“As the match went on, Andy started to return really well, Jamie was very, very sharp around the net and his serve has improved a lot. On a faster court like this maybe the team who played more attacking tennis at the net won the day.
“We’re going to need the Glasgow roar tomorrow. Everyone is tired, it’s that stage of the season. It’s the same for their team, but if there’s somebody you want going out to get the first rubber on the board, it’s Andy Murray.”