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    vs.      
Koutarou Ootsuka leads the series against Tsutomu Sasaki, 2-0.

event round table player one result player two
Grand Prix Kobe 20081221Ootsuka, Koutarou (1991)Won 2-0Sasaki, Tsutomu (1693)
Grand Prix Hiroshima 2011158Ootsuka, Koutarou (1809)Won 2-1Sasaki, Tsutomu (1677)