Grimmett, Roberto
Current rating: 1449
Record: 4-7
| Grand Prix Tampa Bay 2019 (modern) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 239 | Williamson, Dylan (1501) | Lost 0-2 | -181444 |
| 2modern | 332 | Mcallister, Nathan (1449) | Won 2-0 | +191463 |
| 3modern | 218 | Skapetis, Tristin (1640) | Won 2-1 | +211484 |
| 4modern | 210 | Witham, Jordan (1518) | Lost 1-2 | -181466 |
| 5modern | 256 | Cook, BrandonJ (1497) | Lost 0-2 | -171449 |
| average opponent: 1521record: 2-3 | new rating: 1449 | |||
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 465 | Nielson, Alex (1500) | Lost 1-2 | -181482 |
| 2standard | 370 | SandersSmith, Deondre R (1482) | Lost 0-2 | -181464 |
| 3standard | 610 | March, Alexander (1464) | Lost 0-2 | -181446 |
| 4standard | 621 | Pettit, Dawson F (1446) | Won 2-0 | +181464 |
| 5standard | 521 | Parus, Alexander (1407) | Lost 0-2 | -191445 |
| 6standard | 457 | Nowak, Chris (1376) | Won 2-1 | +171462 |
| average opponent: 1446record: 2-4 | new rating: 1462 | |||