Friday is upset day on the women's side at the U.S. Open.
Belinda Bencic upset No. 6 Angelique Kerber 6-1, 7-5, only a few minutes after No. 2 Simona Halep was defeated by Mirjana Lucic-Baroni.
Bencic, only 17, saved four set points before knocking out Kerber, who came into the tournament ranked seventh in the world.
Feature photo courtesy of @WTA