Phung, Jonathan
Current rating: 1437
| Grand Prix Montreal 2019 (ELD limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 305 | Benn, Adam (1716) | Lost 0-2 | -131455 |
| 2sealed | 357 | Coulombe, Hubert (1483) | Lost 0-2 | -181437 |
| top | average opponent: 1599record: 0-2 | new rating: 1437 | ||
| Grand Prix Niagara Falls 2019 (legacy) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 172 | Villagran-Sazo, Sergio (1486) | Won 2-1 | +181502 |
| 2legacy | 106 | Kikta, Mark (1407) | Lost 1-2 | -201482 |
| 3legacy | 384 | Todd, Macy (1483) | Lost 1-2 | -181464 |
| 4legacy | 394 | Strasler, Luke (1637) | Won 2-0 | +211485 |
| 5legacy | 274 | Miller, Brian D (1554) | Lost 1-2 | -171468 |
| top | average opponent: 1513record: 2-3 | new rating: 1468 | ||
| Grand Prix Toronto 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 24 | Cruz, Marcelo (1500) | Lost 0-2 | -181482 |
| 2modern | 448 | Bozhyk, Roman (1470) | Won 2-0 | +181500 |
| 3modern | 439 | Edge, Michael (1501) | Won 2-0 | +181518 |
| 4modern | 218 | So, Kaspar (1535) | Lost 0-2 | -181500 |
| 5modern | 288 | Chainer, Daniel (1588) | Lost 0-2 | -161484 |
| top | average opponent: 1519record: 2-3 | new rating: 1484 | ||