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    vs.      
Tsutomu Yamada is tied in the series against Kok Seng Ong, 1-1.

event round table player one result player two
Grand Prix Kuala Lumpur 20021023Yamada, Tsutomu (1587)Lost 0-2Ong, Kok Seng (1559)
Grand Prix Singapore 20051012Yamada, Tsutomu (1690)Won 2-1Ong, Kok Seng (1724)