German second seed Angelique Kerber reached the US Open third round on Wednesday with a 6-2, 7-6 (9/7) win over Croatia's Mirjana Lucic-Baroni.

Australian Open champion Kerber will face either Shelby Rogers or CiCi Bellis, both of the United States, for a place in the last 16.

Naomi Osaka (JPN) bt Ying-Ying Duan (CHN) 6-4, 7-6 (7/3)

Monica Niculescu (ROM) bt Ana Bogdan (ROM) 6-0, 6-1

Caroline Wozniacki (DEN) bt Svetlana Kuznetsova (RUS x9) 6-4, 6-4

Johanna Konta (GBR x13) bt Tsvetana Pironkova (BUL) 6-2, 5-7, 6-2

Belinda Bencic (SUI x24) bt Andrea Petkovic (GER) 6-3, 6-2

Kateryna Bondarenko (UKR) bt Zheng Saisai (CHN) 5-7, 7-6 (7/5), 7-5

Carina Witthoeft (GER) bt Yulia Putintseva (KAZ) 6-1, 6-7 (1/7), 6-1

Lesia Tsurenko (UKR) bt Wang Yafan (CHN) 7-5, 6-3

Dominika Cibulkova (SVK) bt Evgeniya Rodina (RUS) 6-7 (5/7), 6-2, 6-2

Petra Kvitova (CZE x14) bt Çagla Büyükakçay (TUR) 7-6 (7/2), 6-3

Elina Svitolina (UKR x22) bt Lauren Davis (USA) 6-1, 4-6, 6-3

CiCi Bellis (USA) bt Shelby Rogers (USA) 2-6, 6-2, 6-2