Victoria Azarenka has reached her first grass-court quarter-final for six years by maintaining her mastery over Angelique Kerber with a straight-sets win in Berlin.
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The seventh seed came from 4-1 down in the second set to progress 6-3 7-5 against the home favourite.
Belarusian Azarenka has now won 10 of her past 11 meetings with three-time grand slam champion Kerber, whose sole victory during that time came in the quarter-finals of the 2016 Australian Open.
American Jessica Pegula awaits Azarenka in the last eight after she eliminated fourth seed Karolina Pliskova.
The world No.26 won 7-5 6-2 against her Czech opponent in an hour and 15 minutes.
While Pliskova's last-16 exit came a day after the top three seeds crashed out of the tournament, Garbine Muguruza had no such problems.
The sixth seed edged a narrow contest against French Open quarter-finalist Elena Rybakina to go through 6-4 6-3 and book a date with France's Alize Cornet.
Muguruza's victory saw her record successive wins on grass for the first time since clinching the Wimbledon title in 2017.
Also on Thursday, 22-year-old qualifier Liudmila Samsonova upset fellow Russian Veronika Kudermetova 6-4 6-3 to set up a clash with American Madison Keys.
Australian Associated Press
