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    vs.      
Kazuya Mitamura is tied in the series against William Postlethwait, 1-1.

event round table player one result player two
Grand Prix Tampa 2009719Mitamura, Kazuya (2022)Won 2-1Postlethwait, William (1697)
Pro Tour Nagoya 20111421Mitamura, Kazuya (1979)Lost 0-2Postlethwait, William (1993)