Roger Federer defeated Cedrik Marcel Stebe 6-3 6-3 in the Halle round of 16 on grass.
Federer R. took it in straight sets.
Federer R. and Stebe C. faced 4 of the same opponents in the last 12 months. Federer R. went 7–0 (100%) against them, Stebe C. 0–4 (0%). Federer R. came out better against 3 of 3 comparable opponents, Stebe C. against 0.
Only 4 common opponents — small sample, treat as indicative.
Roger Federer beat Cedrik Marcel Stebe 6-3 6-3. Umpiry, "Roger Federer vs Cedrik Marcel Stebe — Halle Round of 16", https://umpiry.com/match/2013-06-10/federer-vs-stebe-halle-r16?utm_source=cite (as of 10 June 2013).