| event | round | table | player one | result | player two |
| Pro Tour Los Angeles 2005 | 15 | 30 | Ootsuka, Koutarou (1807) | Lost 0-2 | Herberholz, Mark (1883) |
| Grand Prix Montreal 2007 | 5 | 19 | Ootsuka, Koutarou (1917) | Won 2-0 | Herberholz, Mark (2103) |
| 2007 World Championship | 6 | 37 | Ootsuka, Koutarou (2000) | Won 2-1 | Herberholz, Mark (2044) |
| Pro Tour San Diego 2010 | 14 | 60 | Ootsuka, Koutarou (1917) | Lost 0-2 | Herberholz, Mark (1723) |