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    vs.      
Sampo Koski is tied in the series against Peter Vieren, 1-1.

event round table player one result player two
Grand Prix Prague 20171180Koski, Sampo (1708)Won 2-1Vieren, Peter (2004)
Grand Prix Prague 20171468Koski, Sampo (1696)Lost 1-2Vieren, Peter (1977)