Kentaro Masuda defeated Dong Hwan Lee 6-3 6-3 in the Korea Masters 4 round of 32 on clay.
Masuda K. took it in straight sets.
Kentaro Masuda beat Dong Hwan Lee 6-3 6-3. Umpiry, "Kentaro Masuda vs Dong Hwan Lee — Korea Masters 4 Round of 32", https://umpiry.com/match/1991-05-20/lee-vs-masuda-korea-masters-4-r32?utm_source=cite (as of 20 May 1991).