Tommy Haas defeated Tobias Kamke 6-1 6-2 in the Washington quarter-final on hard.
Haas T. took it in straight sets.
Haas T. and Kamke T. faced 4 of the same opponents in the last 12 months. Haas T. went 2–3 (40%) against them, Kamke T. 0–4 (0%). Haas T. came out better against 2 of 3 comparable opponents, Kamke T. against 0.
Only 4 common opponents — small sample, treat as indicative.
Tommy Haas beat Tobias Kamke 6-1 6-2. Umpiry, "Tommy Haas vs Tobias Kamke — Washington Quarter-final", https://umpiry.com/match/2012-07-30/haas-vs-kamke-washington-qf?utm_source=cite (as of 30 July 2012).