Bumpei Sato advanced when Mark Alexander Kepler retired 7-5 2-0 in the Thailand F2 round of 32.
Sato B. advanced when Kepler M. retired.
Bumpei Sato beat Mark Alexander Kepler 7-5 2-0 after Mark Alexander Kepler retired. Umpiry, "Bumpei Sato vs Mark Alexander Kepler — Thailand F2 Round of 32", https://umpiry.com/match/2012-05-14/kepler-vs-sato-thailand-f2-r32?utm_source=cite (as of 14 May 2012).