Bumpei Sato defeated Yasutaka Uchiyama 6-4 6-3 in the Japan F9 round of 32 on hard. The upset overturned the form book — Yasutaka Uchiyama came in leading the head-to-head 1–0, but Bumpei Sato had been the form player, winning 1 of their last 6 on hard. Bumpei Sato claimed a first win over Yasutaka Uchiyama in two meetings, levelling the head-to-head at 1–1.
Sato B. took it in straight sets.
Hard: Sato B. leads 1–0 · Clay: Uchiyama Y. leads 1–0
Bumpei Sato beat Yasutaka Uchiyama 6-4 6-3. Umpiry, "Bumpei Sato vs Yasutaka Uchiyama — Japan F9 Round of 32", https://umpiry.com/match/2012-10-15/sato-vs-uchiyama-japan-f9-r32?utm_source=cite (as of 15 October 2012).