Sloane Stephens defeated Timea Bacsinszky 6-4 6-3 in the USA vs SUI round robin on hard. The result followed the form book — Sloane Stephens came in leading the head-to-head 1–0. Sloane Stephens extended the head-to-head to 2–0.
Stephens S. took it in straight sets.
Stephens S. and Bacsinszky T. faced 4 of the same opponents in the last 12 months. Stephens S. went 3–1 (75%) against them, Bacsinszky T. 4–0 (100%). Only 1 of the comparisons are context-comparable — too few for a conclusion.
Only 4 common opponents — small sample, treat as indicative.
Sloane Stephens beat Timea Bacsinszky 6-4 6-3. Umpiry, "Sloane Stephens vs Timea Bacsinszky — USA vs SUI Round Robin", https://umpiry.com/match/2019-04-20/bacsinszky-vs-stephens-usa-vs-sui-rr?utm_source=cite (as of 20 April 2019).