Duck Hee Lee defeated Keisuke Saitoh 6-3 7-5 in the M15 Yanagawa 2 quarter-final on hard. The result followed the form book — Duck Hee Lee came in leading the head-to-head 1–0. Duck Hee Lee extended the head-to-head to 2–0.
Lee D. took it in straight sets.
Duck Hee Lee beat Keisuke Saitoh 6-3 7-5. Umpiry, "Duck Hee Lee vs Keisuke Saitoh — M15 Yanagawa 2 Quarter-final", https://umpiry.com/match/2023-12-29/lee-vs-saitoh-m15-yanagawa-2-qf?utm_source=cite (as of 29 December 2023).