Viktor Troicki defeated Karen Khachanov 6-4 6-7 6-3 1-6 7-6 in the RUS vs SRB round robin on hard. The upset overturned the form book — Karen Khachanov came in leading the head-to-head 1–0. Viktor Troicki claimed a first win over Karen Khachanov in two meetings, levelling the head-to-head at 1–1.
Troicki V. came through in five sets.
Troicki V. and Khachanov K. faced 3 of the same opponents in the last 12 months. Troicki V. went 1–3 (25%) against them, Khachanov K. 3–1 (75%). Results against comparable opponents are close (0 : 1 better-results split).
Only 3 common opponents — small sample, treat as indicative.
Viktor Troicki beat Karen Khachanov 6-4 6-7 6-3 1-6 7-6. Umpiry, "Viktor Troicki vs Karen Khachanov — RUS vs SRB Round Robin", https://umpiry.com/match/2017-02-03/khachanov-vs-troicki-rus-vs-srb-rr?utm_source=cite (as of 3 February 2017).