Barty had some trouble in the first set against the two-time Australian Open champion and saved three break points at 5-5 to go on to win 7-6(2) 6-3 and level the tie at 1-1.

Aryna Sabalenka earlier gave Belarus a strong start to the tie when she beat former U.S. Open champion Sam Stosur 7-5 5-7 6-3 in two hours, 47 minutes.

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"I knew the first set would be key," Barty said of her match against her current doubles partner.

Ashleigh Barty of Australia embraces Victoria Azarenka of Belarus following their first round match of the Fed Cup tennis semi-final between Australia and Belarus at the Pat Rafter Arena in Brisbane on April 20, 2019

Image credit: Getty Images

I dug myself into a hole in that 5-5 game but I went back to what I do well and got out of it.

"For me it was just about me coming out and doing every thing right. I prepared really well all week."

World number 10 Sabalenka looked completely out of sorts in the first two sets against Stosur, with both players struggling to hold serve.

Sabalenka, however, turned up her power game in the third and after establishing a 4-1 lead blew her first match point opportunity in the eighth game on Stosur's serve when she blasted a backhand volley wide with the court open.

She raced out to a 40-0 lead in the next game and while Stosur saved her second match point, the Australian sent a backhand long on the next point that gave Belarus a 1-0 lead.

Ashleigh Barty of Australia celebrates her victory over Victoria Azarenka of Belarus during their first round match of the Fed Cup tennis semi-final between Australia and Belarus at the Pat Rafter Arena in Brisbane on April 20, 2019.

Image credit: Getty Images

"It was an unbelievable match," Sabalenka said. "She played so quick, I couldn't touch the ball on her returns. You must fight for each point.

I'm happy to have handled her level today

Australia captain Alicia Molik praised Stosur's performance but also hinted that she may change her lineup for the reverse singles on Sunday, depending on how the 35-year-old recovers.

Australia are attempting to reach their first Fed Cup final since 1993. They have not won the title since 1974.

Belarus were beaten 3-2 by the United States in their only Fed Cup final appearance in Minsk in 2017.

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