Shuichi Sekiguchi defeated Tatsuma Ito 4-6 6-3 7-5 in the M25 Kashiwa 1 round of 32 on hard. The upset overturned the form book — Tatsuma Ito came in leading the head-to-head 5–1, but Shuichi Sekiguchi had been the form player, winning 6 of their last 8 on hard. Shuichi Sekiguchi narrowed the head-to-head to 5–2.
Sekiguchi S. came through in three sets.
Hard: Ito T. leads 4–2 · Clay: Ito T. leads 1–0
Shuichi Sekiguchi beat Tatsuma Ito 4-6 6-3 7-5. Umpiry, "Shuichi Sekiguchi vs Tatsuma Ito — M25 Kashiwa 1 Round of 32", https://umpiry.com/match/2023-04-05/ito-vs-sekiguchi-m25-kashiwa-1-r32?utm_source=cite (as of 5 April 2023).