Roberta Vinci defeated Jie Zheng 6-4 6-1 in the Berlin qualifying round of 64 on grass.
Vinci R. took it in straight sets.
Vinci R. and Zheng J. faced 3 of the same opponents in the last 12 months. Vinci R. went 1–2 (33%) against them, Zheng J. 1–2 (33%). Only 2 of the comparisons are context-comparable — too few for a conclusion.
Only 3 common opponents — small sample, treat as indicative.
Roberta Vinci beat Jie Zheng 6-4 6-1. Umpiry, "Roberta Vinci vs Jie Zheng — Berlin Qualifying Round of 64", https://umpiry.com/match/2004-05-03/vinci-vs-zheng-berlin-q64?utm_source=cite (as of 3 May 2004).