Carla Suárez Navarro is bidding to become the first Spanish female semifinalist at the Australian Open since Conchita Martínez in 2000, while Elise Mertens is attempting to become the first Belgian since Kim Clijsters in 2012.
Caroline Wozniacki has won all three previous meetings with Suárez Navarro on hard courts, as well as the three quarterfinals the pair have played.
The Dane is bidding to reach her first semifinal in Melbourne since 2011, while her opponent has never passed this stage, having been beaten in straight sets by Elena Dementieva in 2011 and Agnieszka Radwanska in 2016.
The combined age of Elina Svitolina and Mertens is 45, making this the youngest Australian Open quarterfinal since Victoria Azarenka (22) beat Radwanska (22), 6-7(0), 6-0, 6-2 in 2012.
Both Svitolina and Mertens have reached the quarterfinals in Melbourne for the first time. The No.4 seed, however, has twice been this far in the French Open but has yet win a Grand Slam last-eight match.
Joel Drucker looks at how Madison Keys might upset Caroline Wozniacki for tennis.com.
Michael Lynch of the Sydney Morning Herald reflects on Angelique Kerber's "bewitching" last-16 victory.
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