Johnston, Matthew [AUS]
Current rating: 1418
| Grand Prix Brisbane 2017 (modern) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 155 | Storkey, Rhys (1500) | Lost 1-2 | -171413 |
| 2modern | 317 | McKenzie, Nathan (1483) | Won 2-0 | +191432 |
| 3modern | 1019 | Edmond, Stephen (1498) | Won 2-0 | +201452 |
| 4modern | 200 | Carpenter, Samuel (1490) | Won 2-1 | +181470 |
| 5modern | 99 | Funtanilla, Rj (1509) | Lost 1-2 | -171453 |
| 6modern | 204 | Thomas, Trent (1463) | Lost 1-2 | -181435 |
| 7modern | 311 | Almushcab, Dunia (1501) | Lost 1-2 | -171418 |
| top | average opponent: 1492record: 3-4 | new rating: 1418 | ||
| Grand Prix Sydney 2016 (EMN limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 86 | Hohnke, Mark (1442) | Lost 1-2 | -191446 |
| 2sealed | 320 | Birch, Matthew (1485) | Lost 1-2 | -171429 |
| 3sealed | 435 | Hilzinger, Joshua (1464) | Draw 1-1 | +11430 |
| 4sealed | 451 | Seaton, Traci (1449) | Won 2-1 | +181448 |
| 5sealed | 393 | Huang, Josh (1446) | Lost 0-2 | -181430 |
| top | average opponent: 1457record: 1-3-1 | new rating: 1430 | ||
| Grand Prix Sydney 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 23 | Bennett, Nathan L (1500) | Won 2-1 | +181518 |
| 2sealed | 92 | Higgins, Will (1518) | Lost 0-2 | -181500 |
| 3sealed | 125 | Yip, Winston (1534) | Lost 1-2 | -171483 |
| 4sealed | 148 | Stevens, David [AUS] (1481) | Lost 0-2 | -181465 |
| top | average opponent: 1508record: 1-3 | new rating: 1465 | ||