Karolina Pliskova is also through after fighting back against Polona Hercog earlier on Friday.
Svitolina also didn’t sail through coming from a set down against Yulia Putintseva to win 3-6, 6-1, 7-6.
Sabalenka on the other hand eased past Jelena Ostapenko in a 6-1, 6-2 win. This comes after she showed brilliant form in the doubles at the US Open.
Alja Tomljanovic picked up a surprise win in some ways against Kiki Bertens with the Aussie ace winning 6-4, 7-6.
Zheng Saisai finally saw off Alison Riske 7-5, 6-3 to complete the line-up.
Second Round Results - 2019 Zhengzhou Open | ||||||||||||
Bertens K. (Ned) | 0 | 4 | 61 | |||||||||
Tomljanovic A. (Aus) | 2 | 6 | 77 | |||||||||
Pliskova Ka. (Cze) | 2 | 6 | 7 | |||||||||
Hercog P. (Slo) | 0 | 3 | 5 | |||||||||
Zheng S. (Chn) | 2 | 7 | 6 | |||||||||
Riske A. (Usa) | 0 | 5 | 3 | |||||||||
Ostapenko J. (Lat) | 0 | 1 | 2 | |||||||||
Sabalenka A. (Blr) | 2 | 6 | 6 | |||||||||
Pliskova Ka. (Cze) | 2 | 6 | 4 | 6 | ||||||||
Kenin S. (Usa) | 1 | 4 | 6 | 1 | ||||||||
Putintseva Y. (Kaz) | 1 | 6 | 1 | 65 | ||||||||
Svitolina E. (Ukr) | 2 | 3 | 6 | 77 |