Ashleigh Barty and Samantha Stosur beat Victoria Azarenka and Aryna Sabalenka of Belarus in the deciding doubles rubber to send Australia through to their first Fed Cup final for 26 years.
Caroline Garcia beat Mihaela Buzărnescu in straight sets to level France's Fed Cup semi-final with Romania at 1-1 after the opening day of singles rubbers.
France's Alize Cornet has admitted her team needs a "miracle" if they are to beat Romania and reach the final of the Fed Cup.
The International Tennis Federation (ITF) have announced the play-off matches for the Fed Cup World Group.
Irina Camelia Begu and Monica Niculescu won the doubles deciding rubber as Romania stunned defending champions the Czech Republic to reach their first Fed Cup semi-final in Ostrava.
Defending champions the Czech Republic and Romania could not be separated after the opening day of their Fed Cup clash finished level in Ostrava.
World number three Simona Halep has talked up Romania's chances of causing an upset as they prepare to take on defending champions the Czech Republic in the Fed Cup quarter-finals this weekend.
Katerina Siniakova won her second rubber to help the Czech Republic lift their 11th Fed Cup trophy after a 3-0 victory over defending champions the United States.
The Czech Republic took a 2-0 lead over defending champions the United States as the Fed Cup Final got underway at Prague's O2 Arena.
The International Tennis Federation (ITF) plan to establish a 16-team standalone Fed Cup tournament in a similar move to the recent overhaul of the Davis Cup.
Defending champions the United States will meet the Czech Republic for the Fed Cup title after both teams came through their respective semi-finals today.
The Czech Republic took a huge step towards reaching the Fed Cup final as Petra Kvitová and Karolína Plíšková gave their team a 2-0 lead in their last four encounter with Germany in Stuttgart.
Defending champions the United States will continue their pursuit of a 19th Fed Cup title when they face France in the semi-finals in Aix-en-Provence this weekend.
Venus Williams earned the United States victory in their Fed Cup World Group first round tie against the Netherlands as her 7-5, 6-1 win over Richel Hogenkamp gave the defending champions an unassailable 3-0 lead on a day when Serena Williams made her long-awaited return to top flight competition.
Venus Williams earned victory in her 1,000th professional singles match to get the defending Fed Cup champions United States off to a winning start in their World Group first round tie against The Netherlands.