Shuai Zhang defeated Jie Zheng 6-1 6-1 in the Ningbo round of 16 on hard.
Zhang S. took it in straight sets.
Zhang S. and Zheng J. faced 2 of the same opponents in the last 12 months. Zhang S. went 1–1 (50%) against them, Zheng J. 1–2 (33%).
Only 2 common opponents — too few for any conclusion. Shown without assessment.
Shuai Zhang beat Jie Zheng 6-1 6-1. Umpiry, "Shuai Zhang vs Jie Zheng — Ningbo Round of 16", https://umpiry.com/match/2013-09-24/zhang-vs-zheng-ningbo-r16?utm_source=cite (as of 24 September 2013).