Juan Martin del Potro defeated Diego Schwartzman 6-4 6-4 7-6 in the US Open round of 128 on hard. The upset overturned the form book — Diego Schwartzman came in defending last year's round of 64.
del Potro J. took it in straight sets.
del Potro J. and Schwartzman D. faced 4 of the same opponents in the last 12 months. del Potro J. went 4–0 (100%) against them, Schwartzman D. 0–4 (0%). del Potro J. came out better against 3 of 3 comparable opponents, Schwartzman D. against 0 — though 1 of those edges carries caveats (retirement).
Only 4 common opponents — small sample, treat as indicative.
Juan Martin del Potro beat Diego Schwartzman 6-4 6-4 7-6. Umpiry, "Juan Martin del Potro vs Diego Schwartzman — US Open Round of 128", https://umpiry.com/match/2016-08-29/potro-vs-schwartzman-us-open-r128?utm_source=cite (as of 29 August 2016).