Zheng beat American fifteenth seed Madison Keys to assert her first win over a top-20 participant since having elbow surgical procedure in July.
Sabelenka has received seven of her eight conferences with Olympic champion Zheng.
Third seed Elena Rybakina cruised into the final 16 with a 6-3 6-4 victory over Ukraine’s Marta Kostyuk.
Kazakhstan’s Rybakina will play Australian qualifier Talia Gibson, who knocked out one other seeded participant courtesy of a 6-2 6-2 win over 18th seed Iva Jovic.
Gibson, who reached the Indian Wells quarter-finals, beat former world primary Naomi Osaka within the second spherical in Miami.
Fifth-seeded American Jessica Pegula, runner-up to Sabalenka final yr, wanted solely an hour and 6 minutes to beat Canada’s Leylah Fernandez 6-2 6-2.
Latvia’s Jelena Ostapenko, runner-up in Miami in 2018, fought again to assert a 5-7 6-2 7-5 win over seventh seed Jasmine Paolini of Italy.
Ostapenko will subsequent play American world quantity 45 Hailey Baptiste, who beat Ukrainian ninth seed Elina Svitolina 6-3 7-5.
