Novak Djokovic advanced when Daniil Medvedev retired 3-6 6-4 6-1 1-0 in the RUS vs SRB round robin.
Djokovic N. advanced when Medvedev D. retired.
Djokovic N. and Medvedev D. faced 2 of the same opponents in the last 12 months. Djokovic N. went 2–0 (100%) against them, Medvedev D. 1–1 (50%).
Only 2 common opponents — too few for any conclusion. Shown without assessment.
Novak Djokovic beat Daniil Medvedev 3-6 6-4 6-1 1-0 after Daniil Medvedev retired. Umpiry, "Novak Djokovic vs Daniil Medvedev — RUS vs SRB Round Robin", https://umpiry.com/match/2017-02-03/djokovic-vs-medvedev-rus-vs-srb-rr?utm_source=cite (as of 3 February 2017).