Toshihide Matsui defeated Sam Groth 6-4 7-6 in the Korea Rep F2 qualifying round on hard. The upset overturned the form book — Sam Groth came in leading the head-to-head 1–0. Toshihide Matsui claimed a first win over Sam Groth in two meetings, levelling the head-to-head at 1–1.
Matsui T. took it in straight sets.
Toshihide Matsui beat Sam Groth 6-4 7-6(4). Umpiry, "Toshihide Matsui vs Sam Groth — Korea Rep F2 Qualifying Round", https://umpiry.com/match/2008-05-05/groth-vs-matsui-korea-rep-f2-qf?utm_source=cite (as of 5 May 2008).