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    vs.      
Matthew Nass leads the series against Jonas Koestler, 2-0.

event round table player one result player two
Grand Prix Pittsburgh 2011101Nass, Matthew (2006)Won 2-1Koestler, Jonas (1987)
Grand Prix San Diego 2011930Nass, Matthew (2019)Won 2-1Koestler, Jonas (1905)