Victoria Azarenka defeated Mona Barthel 6-1 6-0 in the Doha round of 32 on hard. The result followed the form book — Victoria Azarenka came in leading the head-to-head 1–0, defending last year's round of 32. Victoria Azarenka extended the head-to-head to 2–0.
Azarenka V. took it in straight sets.
Azarenka V. and Barthel M. faced 4 of the same opponents in the last 12 months. Azarenka V. went 5–0 (100%) against them, Barthel M. 2–2 (50%). Azarenka V. came out better against 2 of 3 comparable opponents, Barthel M. against 0.
Only 4 common opponents — small sample, treat as indicative.
Victoria Azarenka beat Mona Barthel 6-1 6-0. Umpiry, "Victoria Azarenka vs Mona Barthel — Doha Round of 32", https://umpiry.com/match/2012-02-13/azarenka-vs-barthel-doha-r32?utm_source=cite (as of 13 February 2012).