Herrera, Donny
Current rating: 1462
Record: 1-3
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 75 | Chancey, Malcolm (1429) | Lost 1-2 | -191481 |
| 2sealed | 281 | Powers, Rebecca (1480) | Won 2-0 | +181499 |
| 3sealed | 226 | Vachris, Paul A (1467) | Lost 0-2 | -191480 |
| 4sealed | 337 | Sykes, Jonathan (1454) | Lost 0-2 | -181462 |
| average opponent: 1458record: 1-3 | new rating: 1462 | |||