Nastja Kolar and Danka Kovinić the fifth seeds , Tang Haochen and Tian Ran the seventh seeds and the biggest upset with the second seeds Eugenie Bouchard and Mónica Puig all went out in the second round .
Nastja Kolar and Danka Kovinić the fifth seeds , Tang Haochen and Tian Ran the seventh seeds and the biggest upset with the second seeds Eugénie Bouchard and Mónica Puig all went out in the second round .