Issei Okamura defeated Duck Hee Lee 6-2 3-6 7-5 in the M15 Changwon 1 round of 16 on hard. The upset overturned the form book — Duck Hee Lee came in leading the head-to-head 1–0. Issei Okamura claimed a first win over Duck Hee Lee in two meetings, levelling the head-to-head at 1–1.
Okamura I. came through in three sets.
Issei Okamura beat Duck Hee Lee 6-2 3-6 7-5. Umpiry, "Issei Okamura vs Duck Hee Lee — M15 Changwon 1 Round of 16", https://umpiry.com/match/2022-08-25/lee-vs-okamura-m15-changwon-1-r16?utm_source=cite (as of 25 August 2022).