event | round | table | player one | result | player two |
Grand Prix Kansas City 2003 | 7 | 7 | Sonne, Jonathan (1852) | Lost 1-2 | Heiss, Nathan (1769) |
Grand Prix Oakland 2004 | 7 | 24 | Sonne, Jonathan (1849) | Lost 1-2 | Heiss, Nathan (1777) |
Grand Prix Columbus 2004 | 14 | 12 | Sonne, Jonathan (1871) | Won 2-0 | Heiss, Nathan (1789) |