Harper, Justin
Current rating: 1362
Record: 4-13
| Grand Prix Brisbane 2017 (modern) | starting rating: 1386 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 99 | Brewer, Brendon (1523) | Lost 1-2 | -151371 |
| 4modern | 273 | Monnier, Declan (1520) | Won 2-0 | +201391 |
| 5modern | 184 | Dunn, Richard [AUS] (1535) | Lost 0-2 | -151376 |
| 6modern | 248 | Crowther, Alex (1416) | Won 2-1 | +191395 |
| 7modern | 131 | Billinghurst, Michael (1449) | Lost 0-2 | -171378 |
| 8modern | 250 | Low, Arthur (1507) | Lost 0-2 | -161362 |
| top | average opponent: 1492record: 2-4 | new rating: 1362 | ||
| Grand Prix Sydney 2016 (EMN limited) | starting rating: 1396 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 263 | Gillett, Jonathon (1500) | Won 2-1 | +201416 |
| 2sealed | 159 | Lau, KaWing (1550) | Lost 0-2 | -151401 |
| 3sealed | 324 | Chen, Allan (1434) | Won 2-1 | +181419 |
| 4sealed | 256 | Knox, Matthew (1480) | Lost 0-2 | -171402 |
| 5sealed | 269 | Craven, Ari (1493) | Lost 0-2 | -161386 |
| top | average opponent: 1491record: 2-3 | new rating: 1386 | ||
| Grand Prix Sydney 2015 (BFZ limited) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 229 | Adams, Miller (1500) | Lost 1-2 | -171428 |
| 2sealed | 331 | Arthur, Patrick (1615) | Lost 0-2 | -141414 |
| 3sealed | 456 | Wang, Yuan [CHN] (1453) | Lost 0-2 | -181396 |
| top | average opponent: 1522record: 0-3 | new rating: 1396 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 377 | Fenoff, William (1512) | Lost 0-2 | -181482 |
| 2sealed | 446 | Cote, Eric (1432) | Lost 0-2 | -191463 |
| 3sealed | 147 | McAdoo, Kathryn (1464) | Lost 0-2 | -181445 |
| top | average opponent: 1469record: 0-3 | new rating: 1445 | ||