Garbine Muguruza of Spain reacts before retiring due injury during the match against Barbora Strycova of Czech Republic on day three of the 2017 China Open at the China National Tennis Centre on October 1st, 2017 in Beijing, China.
Image credit: Eurosport
There was also an early exit for eighth seed Dominika Cibulkova, who was ousted 7-6 (7/4) 6-1 by Elise Mertens, and 10th seed Angelique Kerber, beaten 6-4 6-4 by Alize Cornet.
Coco Vandeweghe kept up her hopes of a place in the WTA Finals with a 6-2 6-2 success over Donna Vekic while Caroline Wozniacki made light work of Anastasia Pavlyuchenkova, winning by the same scoreline.
Shuai Peng beat Shelby Rogers 7-6 (7/3), Elena Vesnina profited from Magda Linette's retirement while Varvara Lepchenko was a 4-7 6-4 6-2 winner against Lesia Tsurenko.