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    vs.      
Riku Kumagai leads the series against Yuuta Iwazaki, 2-0.

event round table player one result player two
Grand Prix Shizuoka 2015386Kumagai, Riku (1740)Won 2-1Iwazaki, Yuuta (1602)
Players Tour Nagoya 2020115Kumagai, Riku (2150)Won 2-0Iwazaki, Yuuta (1889)