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    vs.      
William Postlethwait is tied in the series against Marijn Lybaert, 1-1.

event round table player one result player two
Pro Tour Amsterdam 2010123Postlethwait, William (1952)Lost 0-2Lybaert, Marijn (1985)
Pro Tour Nagoya 2011895Postlethwait, William (1976)Won 2-1Lybaert, Marijn (1830)