Petra Kvitova (CZE)  vs. Ashleigh Barty (AUS) . This is a reprise of the 2019 Sydney final, which was won by Kvitova in a 3rd set tiebreak. Presumably that experience should give the Czech 2-time major champion the edge against the craft Aussie who will almost certainly have the entire crowd rooting for her. It's very possible this could be another barn burner of a match. Peak Petra is unplayable, but did Kvitova peak too early be dispatching the teenage phenom Ananda Anisimova the round before in straight sets? Has Barty finally realized she has the tools to hang with the big babes now that she outlasted Maria Sharapova 6-4 in the 3rd set? This should be an exciting match-up. The winner will play the winner of the Serena-Pliskova match so the final will still be a fair distance away. All that being said, I think experience may be dispositive. PREDICTION: Kvitova.
Naomi Osaka (JPN)  vs. Elina Svitolina (UKR) . This may be the most exciting of the four quarterfinals. These two players are the closest in ranking of any of the match-ups with Svitolina holding a tight 3-2 lead in their head-to-head, including both times they played in 2018, with all 5 meetings on hard courts. That being said, is Osaka really the same player after having won a slam (2018 US Open) by defeating her idol Serena Williams? Probably not, but neither is Elina Svitolina, having won the 2018 year-end championship by outlasting Sloane Stephens. Osaka has had to problem solve her way through two tricky opponents in the last two rounds (Anastasja Sevastova and Su-Wei Hseih) while Svitolina survived the barrage against Madison Keys to win a see-saw 6-2 1-6 6-1 slugfest. Playing Keys is a good preparation for playing Osaka but there's no question that Osaka is a smarter player than the American. Svitolina is the women's tour version of Sascha Zverev and it is definitely time for her to breakthrough at a major. Is this the match that does it? I think it is very possible, but now I give Osaka the edge because she has more experience, despite being significantly younger. PREDICTION: Osaka.