Mona Barthel overcame the deficit of losing the opening set to love and saving 3 match points, only to lose the match in the end to Lauren Davis. She lost 0-6 7-5 4-6. Madison Keys, Serena Williams and Kaia Kanepi on the other hand, were all winners of their first round matches in straight sets over Dominika Cibulkova, Elena Vesnina and Julia Goerges respectively.
Keys beat the Slovak 6-4 6-3. The reigning US Open champion Williams defeated the Russian Vesnina 6-4 6-2 and Kanepi downed Goerges 7-5 6-4.
Davis meets the Spanish player and 12th seed Carla Suarez-Navarro in her second round match while Kanepi plays the Czech Lucie Safarova. Keys gets the third seeded Agnieszka Radwanska.