Dominic Thiem defeated Steven Diez 6-3 6-3 in the Barcelona qualifying round of 32 on clay.
Thiem D. took it in straight sets.
Thiem D. and Diez S. faced 3 of the same opponents in the last 12 months. Thiem D. went 3–0 (100%) against them, Diez S. 0–4 (0%). Thiem D. came out better against 3 of 3 comparable opponents, Diez S. against 0 — though 3 of those edges carry caveats (lower-tier event).
Only 3 common opponents — small sample, treat as indicative.
Dominic Thiem beat Steven Diez 6-3 6-3. Umpiry, "Dominic Thiem vs Steven Diez — Barcelona Qualifying Round of 32", https://umpiry.com/match/2014-04-19/diez-vs-thiem-barcelona-q32?utm_source=cite (as of 19 April 2014).