Australia lead the seven-match rubber 3-1 and can win the series on Sunday.

BBC: Australia's Shane Watson set for Brisbane return

Despite dropping the first set, Schiavone raced to a 4-1 lead in the second set on her way to levelling the rubber.

BBC: Flavia Pennetta

Argentina looked on course for a commanding lead when Del Potro took the opening set of the second rubber, but Lopez produced one of the performances of his career to recover.

BBC: Lopez draws Spain level in final

Wimbledon champion Petra Kvitova gave the Czechs an unbeatable 3-0 lead after seeing off Francesca Schiavone 6-4 7-6 in the first rubber of the day.

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