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    vs.      
Martin Zimmermann trails the series against Helmut Summersberger, 1-2.

event round table player one result player two
Grand Prix Rotterdam 20091522Zimmermann, Martin (1801)Lost 1-2Summersberger, Helmut (1894)
Grand Prix Bochum 201076Zimmermann, Martin (1918)Lost 0-2Summersberger, Helmut (1939)
Grand Prix Gothenburg 20131020Zimmermann, Martin (1902)Won 2-1Summersberger, Helmut (1885)