Jordan Thompson defeated Jack Sock 6-3 3-6 7-6 6-4 in the AUS vs USA round robin on hard.
Thompson J. came through in four sets.
Thompson J. and Sock J. faced 4 of the same opponents in the last 12 months. Thompson J. went 2–2 (50%) against them, Sock J. 3–1 (75%). Sock J. came out better against 2 of 3 comparable opponents, Thompson J. against 0 — though 1 of those edges carries caveats (retirement).
Only 4 common opponents — small sample, treat as indicative.