Juan Martin del Potro defeated Radek Stepanek 6-4 6-4 6-2 in the ARG vs CZE round robin on clay. The upset overturned the form book — Radek Stepanek came in leading the head-to-head 3–1. Juan Martin del Potro narrowed the head-to-head to 3–2.
del Potro J. took it in straight sets.
del Potro J. and Stepanek R. faced 10 of the same opponents in the last 12 months. del Potro J. went 7–8 (47%) against them, Stepanek R. 2–10 (17%). del Potro J. came out better against 3 of 7 comparable opponents, Stepanek R. against 0 — though 1 of those edges carries caveats (retirement).
Clay: del Potro J. leads 1–0 · Hard: Stepanek R. leads 3–1
Juan Martin del Potro beat Radek Stepanek 6-4 6-4 6-2. Umpiry, "Juan Martin del Potro vs Radek Stepanek — ARG vs CZE Round Robin", https://umpiry.com/match/2012-09-14/potro-vs-stepanek-arg-vs-cze-rr?utm_source=cite (as of 14 September 2012).