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    vs.      
Grzegorz Kowalski leads the series against Rogier Kleij, 2-0.

event round table player one result player two
Grand Prix Amsterdam 20119632Kowalski, Grzegorz (1637)Won 1-0Kleij, Rogier (1694)
Grand Prix Bochum 2012512Kowalski, Grzegorz (1831)Won 2-0Kleij, Rogier (1661)