Nadia Petrova defeated Maria Sharapova 6-1 6-2 in the Los Angeles round robin on hard. The upset overturned the form book — Maria Sharapova came in leading the head-to-head 3–0, defending the title, but Nadia Petrova had been the form player, winning 3 of their last 7 on hard. Nadia Petrova claimed a first win over Maria Sharapova in four meetings, narrowing the head-to-head to 3–1.
Petrova N. took it in straight sets.
Petrova N. and Sharapova M. faced 15 of the same opponents in the last 12 months. Petrova N. went 7–10 (41%) against them, Sharapova M. 16–5 (76%). Sharapova M. came out better against 7 of 14 comparable opponents, Petrova N. against 1 — though 2 of those edges carry caveats (retirement).
Hard: Sharapova M. leads 2–1 · Grass: Sharapova M. leads 1–0
Nadia Petrova beat Maria Sharapova 6-1 6-2. Umpiry, "Nadia Petrova vs Maria Sharapova — Los Angeles Round Robin", https://umpiry.com/match/2005-11-11/petrova-vs-sharapova-los-angeles-rr?utm_source=cite (as of 11 November 2005).