Argentina fought back to beat Croatia 3-2 and win the Davis Cup for the first time in a dramatic final in Zagreb.
Croatia led 2-1 going into the final day and looked on course for their second title when Marin Cilic led Juan Martin del Potro by two sets to love.
However, Del Potro staged a remarkable comeback to win 6-7 (4-7) 2-6 7-5 6-4 6-3 in four hours 53 minutes.
Federico Delbonis then swept past Ivo Karlovic 6-3 6-4 6-2 in the decisive fifth contest to clinch victory.
Argentina had lost in four previous finals but, roared on by a vociferous 1,500-strong group of travelling fans that included 1986 World Cup winner Diego Maradona, the visitors secured a stunning win.