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    vs.      
Klaas Gruber leads the series against Sander van Herwaarden, 2-0.

event round table player one result player two
Grand Prix Amsterdam 2017915Gruber, Klaas (1808)Won 2-1van Herwaarden, Sander (1825)
Grand Prix Birmingham 20176147Gruber, Klaas (1838)Won 2-0van Herwaarden, Sander (1866)