Andrea Petkovic defeated Lara Arruabarrena 6-1 6-2 in the New Haven qualifying round 1 on hard. The result followed the form book — Andrea Petkovic came in leading the head-to-head 1–0. Andrea Petkovic extended the head-to-head to 2–0.
Petkovic A. took it in straight sets.
Petkovic A. and Arruabarrena L. faced 3 of the same opponents in the last 12 months. Petkovic A. went 3–0 (100%) against them, Arruabarrena L. 2–1 (67%). Only 1 of the comparisons are context-comparable — too few for a conclusion.
Only 3 common opponents — small sample, treat as indicative.
Hard: Petkovic A. leads 1–0 · Clay: Petkovic A. leads 1–0
Andrea Petkovic beat Lara Arruabarrena 6-1 6-2. Umpiry, "Andrea Petkovic vs Lara Arruabarrena — New Haven Qualifying Round 1", https://umpiry.com/match/2018-08-20/arruabarrena-vs-petkovic-new-haven-q1?utm_source=cite (as of 20 August 2018).