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    vs.      
Toshiharu Niwa is tied in the series against Chuan Sun, 1-1.

event round table player one result player two
Grand Prix Beijing 2016774Niwa, Toshiharu (1661)Lost 0-2Sun, Chuan (1731)
Grand Prix Shanghai 20177134Niwa, Toshiharu (1530)Won 2-0Sun, Chuan (1983)