Ash Barty and Sam Stosur are set for an all Australian clash in the third round of the Miami Open.
Barty continued her flying form in 2019 and breezed past Ukraine's Dayana Yastremska 6-4 6-1 in just over an hour, winning 73 per cent of first-serve points.
Meanwhile in Hard Rock Stadium, her compatriot pulled off a thrilling upset over world no.16 Madison Keys.
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After leading 6-4 4-0, Stosur lost six straight games to send the match into a deciding set.
The rollercoaster ride continued as the 34-year-old Australian went down 2-4 in the third before bouncing back to defeat the American 6-4 4-6 6-4.
“At a set and 4-0 I was feeling pretty good. Then I think from that point she just loosened up, started playing better, and it became quite a battle,” Stosur said after the match.
“There’s been a lot of work going into this to try and get myself back to this position, to try to fight through these sorts of matches. So to be able to come out on top like that is really pleasing.
“And especially even from that lead, to lose that, and still be able to hold my head high and play as well as what I did, I’m really happy.”
Stosur has now won all three head-to-head encounters against Keys, winning both of their previous meetings in straight sets back in 2013.
.@bambamsam30 upsets Keys at the @MiamiOpen!
— WTA (@WTA) March 22, 2019
Moves into the third round with a 6-4, 4-6, 6-4 win! pic.twitter.com/hoBd48yY32
The former US Open Champion also holds a 1-0 lead over compatriot Barty, defeating the world No.11 6-4 6-4 at the same tournament two years previously.
Back then, Stosur was ranked No.18 while Barty entered the tournament as a wildcard.
Their victories came after Daria Gavrilova suffered her seventh loss of the season, going down 6-1 6-4 to Slovakia's Vikotoria Kuzmova.
However, Ajla Tomjlanovic will also join Barty and Stosur in the round-of-64 as she triumphed over Anna-Lena Friedsam 4-6 6-3 6-0.