Costa, Michael
Current rating: 1453
Record: 3-6
| Grand Prix Cleveland 2019 (RNA limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 19 | Prieto, Luis Delfin (1685) | Lost 0-2 | -151467 |
| 2sealed | 278 | Groff, Nikki (1482) | Lost 0-2 | -171450 |
| 3sealed | 550 | Combine, Lucas (1459) | Won 2-0 | +181468 |
| 4sealed | 451 | Sterling, James (1487) | Lost 0-2 | -181450 |
| 5sealed | 461 | Fulgenzi, Ashley (1469) | Lost 0-2 | -181432 |
| 6sealed | 400 | Orlando, Nicholas (1432) | Won 2-0 | +181450 |
| 7sealed | 329 | Miller, Brian D (1580) | Won 2-1 | +211471 |
| 8sealed | 251 | Messner, Devon (1495) | Lost 0-2 | -181453 |
| average opponent: 1511record: 3-5 | new rating: 1453 | |||
| Grand Prix Pittsburgh 2018 (DOM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 239 | Clark, Justin (1482) | Lost 0-2 | -181482 |
| record: 0-1 | new rating: 1482 | |||