Jonathan Gray defeated Sho Katayama 6-4 6-1 in the Vietnam F2 qualifying round on hard. The upset overturned the form book — Sho Katayama came in leading the head-to-head 1–0. Jonathan Gray claimed a first win over Sho Katayama in two meetings, levelling the head-to-head at 1–1.
Gray J. took it in straight sets.
Jonathan Gray beat Sho Katayama 6-4 6-1. Umpiry, "Jonathan Gray vs Sho Katayama — Vietnam F2 Qualifying Round", https://umpiry.com/match/2017-11-13/gray-vs-katayama-vietnam-f2-qf?utm_source=cite (as of 13 November 2017).