Naoki Tajima defeated Yuta Shimizu 6-4 7-6 in the M15 Tsukuba 1 quarter-final on hard.
Tajima N. took it in straight sets.
Naoki Tajima beat Yuta Shimizu 6-4 7-6(5). Umpiry, "Naoki Tajima vs Yuta Shimizu — M15 Tsukuba 1 Quarter-final", https://umpiry.com/match/2019-03-29/shimizu-vs-tajima-m15-tsukuba-1-qf?utm_source=cite (as of 29 March 2019).