Sloane Stephens and Angelique Kerber opened the quarterfinal action and the reigning US Open champion stunned her German opponent 6-1 6-2, making her first semifinal since the surprise run at Flushing Meadows and ensuring a Top 10 debut when the new rankings are released on Monday. In the windy night session, three-time Miami Open champion Victoria Azarenka upset Karolina Pliskova 7-5 6-3, earning a return to the Top 100 in the process of building her way back up after childbirth and custody problems.
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