Seeded 30th at the Australian Open, she recorded straight-set wins over Nina Stojanović and Taylor Townsend in her first two matches. She then caused a huge upset by defeating second seed Karolína Plíšková in the third round, her first win in seven career meetings over the former world No. 1. She then came from a set down to defeat 2016 champion and 17th seeded Angelique Kerber to advance to the quarterfinals for the second year in a row, also her sixth Grand Slam quarterfinal in total. There, she was defeated by eventual runner-up Garbiñe Muguruza in straight sets.