| event | round | table | player one | result | player two |
| Pro Tour Columbus 2004 | 10 | 1 | Siron, Geoffrey (1924) | Lost 1-2 | Oiso, Masashi (2017) |
| Pro Tour London 2005 | 7 | 30 | Siron, Geoffrey (1798) | Won 2-1 | Oiso, Masashi (2160) |
| Pro Tour London 2005 | 13 | 11 | Siron, Geoffrey (1887) | ID | Oiso, Masashi (2202) |
| Pro Tour London 2005 | Q | Siron, Geoffrey (1887) | Won 3-0 | Oiso, Masashi (2202) | |
| Pro Tour Los Angeles 2005 | 10 | 32 | Siron, Geoffrey (1930) | Won 2-0 | Oiso, Masashi (2150) |