Alex Rybakov defeated Evan Zhu 6-1 6-4 in the USA F2 round of 16 on hard.
Rybakov A. took it in straight sets.
Alex Rybakov beat Evan Zhu 6-1 6-4. Umpiry, "Alex Rybakov vs Evan Zhu — USA F2 Round of 16", https://umpiry.com/match/2018-01-08/rybakov-vs-zhu-usa-f2-r16?utm_source=cite (as of 8 January 2018).