Charleston Open: Ostapenko knocks out Chirico to move into last 16

Latvian Jelena Ostapenko, the No 11 seed, beat American qualifier Louisa Chirico 7-5, 6-2 to reach the last 16 of the Charleston Open at the Family Circle Tennis Center.

Ostapenko, ranked No 25, will play No 7 seed Danielle Collins next.

In the previous round of the Charleston tournament, Chirico, ranked No 167, edged out Russian Erika Andreeva (6-4, 3-6, 6-4).

Charleston WTA 500, other second-round results (Family Circle Tennis Center, clay, USD 1.064.510, most recent results first):

• Varvara Gracheva vs. Elise Mertens
• Qinwen Zheng vs. Maria Sakkari
• Ashlyn Krueger vs. Katie Volynets
• Ajla Tomljanovic vs. Peyton Stearns
• Sofia Kenin vs. Belinda Bencic
• Shuai Zhang vs. Yulia Putintseva
• Jessica Pegula vs. Iryna Shymanovich
• Ekaterina Alexandrova vs. Ann Li: wednesday
• Hailey Baptiste vs. Emma Navarro: wednesday
• Anna Kalinskaya (14) beat Catherine McNally (Q): 6-1, 6-4
• Daria Kasatkina (5) beat Lauren Davis (WC): 6-1, 6-1
• Diana Shnaider (6) beat Polina Kudermetova: 6-3, 6-2
• Amanda Anisimova (8) beat Veronika Kudermetova: 6-2, 6-2
• Danielle Collins beat Robin Montgomery: 6-3, 6-1
• Madison Keys (2) beat Caroline Dolehide: 6-3, 7-6 (4)