event | round | table | player one | result | player two |
Grand Prix Rotterdam 2009 | 15 | 22 | Zimmermann, Martin (1801) | Lost 1-2 | Summersberger, Helmut (1894) |
Grand Prix Bochum 2010 | 7 | 6 | Zimmermann, Martin (1918) | Lost 0-2 | Summersberger, Helmut (1939) |
Grand Prix Gothenburg 2013 | 10 | 20 | Zimmermann, Martin (1902) | Won 2-1 | Summersberger, Helmut (1885) |