Victoria Azarenka defeated Jelena Jankovic 6-4 6-1 in the Doha round robin on hard. The upset overturned the form book — Jelena Jankovic came in leading the head-to-head 3–2, defending last year's semi-final. That levelled the head-to-head at 3–3.
Azarenka V. took it in straight sets.
Azarenka V. and Jankovic J. faced 13 of the same opponents in the last 12 months. Azarenka V. went 9–11 (45%) against them, Jankovic J. 10–10 (50%). Results against comparable opponents are close (6 : 5 better-results split).
Hard: Jankovic J. leads 3–2 · Carpet: Azarenka V. leads 1–0
Victoria Azarenka beat Jelena Jankovic 6-4 6-1. Umpiry, "Victoria Azarenka vs Jelena Jankovic — Doha Round Robin", https://umpiry.com/match/2010-10-29/azarenka-vs-jankovic-doha-rr?utm_source=cite (as of 29 October 2010).