Shuai Zhang defeated Alison Riske 6-4 6-4 in the Miami qualifying round of 64 on hard.
Zhang S. took it in straight sets.
Zhang S. and Riske A. faced 2 of the same opponents in the last 12 months. Zhang S. went 2–0 (100%) against them, Riske A. 0–2 (0%).
Only 2 common opponents — too few for any conclusion. Shown without assessment.
Shuai Zhang beat Alison Riske 6-4 6-4. Umpiry, "Shuai Zhang vs Alison Riske — Miami Qualifying Round of 64", https://umpiry.com/match/2011-03-21/riske-vs-zhang-miami-q64?utm_source=cite (as of 21 March 2011).