Donald Young defeated John Isner 7-6 3-6 7-6 in the Memphis quarter-final on hard. The upset overturned the form book — John Isner came in leading the head-to-head 2–0. Donald Young claimed a first win over John Isner in three meetings, narrowing the head-to-head to 2–1.
Young D. came through in three sets.
Young D. and Isner J. faced 4 of the same opponents in the last 12 months. Young D. went 1–3 (25%) against them, Isner J. 2–2 (50%). Results against comparable opponents are close (0 : 1 better-results split).
Only 4 common opponents — small sample, treat as indicative.
Donald Young beat John Isner 7-6(5) 3-6 7-6(6). Umpiry, "Donald Young vs John Isner — Memphis Quarter-final", https://umpiry.com/match/2017-02-17/isner-vs-young-memphis-qf?utm_source=cite (as of 17 February 2017).