Miami Open: Zheng advances to third round after Siniakova retires

Chinese Qinwen Zheng, the No 7 seed, advanced to the third round of the Miami Open when Katerina Siniakova retired on Thursday night at the Hard Rock Stadium.

Zheng, ranked No 7, led 4-6, 6-3, 1-0 when Siniakova, ranked No 42, pulled out with what appeared to be a right hip issue.

The 21-year-old Chinese player will face the winner of the match between American Peyton Stearns and Belarusian Victoria Azarenka, the No 27 seed, next.

Katerina Siniakova won against Romanian Ana Bogdan (6-2, 6-4) in the previous round of the Miami tournament.

Miami WTA 1000, other second-round results (Hard Rock Stadium, hard, USD 8.770.480, most recent results first):

• Iga Swiatek vs. Camila Giorgi
• Elina Avanesyan vs. Ons Jabeur
• Sloane Stephens vs. Sorana Cirstea
• Naomi Osaka vs. Elina Svitolina
• Anastasia Potapova vs. Danielle Collins
• Lin Zhu vs. Jessica Pegula
• Maria Timofeeva vs. Linda Noskova
• Daria Kasatkina vs. Claire Liu
• Caroline Garcia vs. Viktoriya Tomova
• Leylah Fernandez vs. Emiliana Arango
• Donna Vekic vs. Ekaterina Alexandrova
• Coco Gauff vs. Nadia Podoroska
• Paula Badosa vs. Aryna Sabalenka
• Arantxa Rus vs. Marta Kostyuk
• Storm Hunter vs. Emma Navarro
• Jasmine Paolini vs. Katie Volynets
• Anastasia Pavlyuchenkova vs. Shelby Rogers
• Clara Tauson vs. Elena Rybakina
• Veronika Kudermetova vs. Xinyu Wang
• Peyton Stearns vs. Victoria Azarenka
• Jelena Ostapenko (9) beat Laura Siegemund (Q): 7-6 (3), 6-4
• Dayana Yastremska (28) beat Daria Saville: 7-5, 7-5
• Madison Keys (17) beat Diana Shnaider: 6-2, 6-4
• Yulia Putintseva beat Liudmila Samsonova (13): 6-1, 4-6, 6-3
• Maria Sakkari (8) beat Yue Yuan: 6-2, 6-2
• Anna Kalinskaya (22) beat Xiyu Wang: 6-2, 6-2
• Anhelina Kalinina (32) beat Caroline Wozniacki (WC): 5-7, 7-5, 6-4
• Greet Minnen (LL) beat Lesia Tsurenko: 7-5, 6-1
• Beatriz Haddad Maia (11) beat Diane Parry: 3-6, 6-1, 6-4
• Katie Boulter (24) beat Brenda Fruhvirtova (WC): 7-6 (5), 1-0 ret.
• Taylor Townsend (Q) beat Elise Mertens (25): 6-2, 6-2