Medak, Joseph
Current rating: 1309
Record: 9-23
| Grand Prix Sydney 2019 (RNA limited) | starting rating: 1311 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 70 | Heremaia, Benjamin (1500) | Won 2-1 | +211332 |
| 2sealed | 62 | Docker, Phoenix (1521) | Won 2-1 | +211353 |
| 3sealed | 34 | Jurkiewicz, Thomas (1509) | Lost 0-2 | -151338 |
| 4sealed | 98 | Hearn, Michael (1508) | Lost 0-2 | -151323 |
| 5sealed | 146 | Zheng, Tianxiang (1551) | Lost 1-2 | -141309 |
| top | average opponent: 1518record: 2-3 | new rating: 1309 | ||
| Grand Prix Sydney 2016 (EMN limited) | starting rating: 1296 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 135 | Low, Adrian (1569) | Lost 0-2 | -131283 |
| 2sealed | 217 | Parker, Kyle (1414) | Won 2-0 | +201303 |
| 3sealed | 359 | Joy, Dean (1497) | Won 2-0 | +221325 |
| 4sealed | 201 | Hearn, Michael (1539) | Lost 0-2 | -141311 |
| top | average opponent: 1505record: 2-2 | new rating: 1311 | ||
| Grand Prix Sydney 2015 (BFZ limited) | starting rating: 1326 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 188 | Diquelou, Marie (1490) | Lost 0-2 | -151311 |
| 2sealed | 425 | Croese, Connor (1482) | Lost 1-2 | -151296 |
| top | average opponent: 1486record: 0-2 | new rating: 1296 | ||
| Grand Prix Sydney 2014 (M15 limited) | starting rating: 1354 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 147 | Crutchfield, Matthew (1464) | Won 2-1 | +201374 |
| 2sealed | 180 | Ho, Keene (1552) | Lost 0-2 | -151359 |
| 3sealed | 225 | Caffini, Alessandro (1392) | Lost 1-2 | -181341 |
| 4sealed | 242 | Andriolo, Brett (1484) | Lost 1-2 | -151326 |
| top | average opponent: 1473record: 1-3 | new rating: 1326 | ||
| Grand Prix Sydney 2013 (RTR limited) | starting rating: 1402 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 229 | Zheng, Patrick (1500) | Lost 0-2 | -161386 |
| 2sealed | 226 | Paton, Jake (1480) | Lost 0-2 | -161370 |
| 3sealed | 265 | Phillips, Jacob (1461) | Lost 0-2 | -161354 |
| top | average opponent: 1481record: 0-3 | new rating: 1354 | ||
| Grand Prix Sydney 2010 (SOM limited) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 149 | Parker, Glenn (1482) | Lost 1-2 | -161399 |
| 2sealed | 142 | Seaton, Traci (1482) | Won 2-0 | +191418 |
| 3sealed | 148 | Ding, Yuan (1499) | Won 2-0 | +201438 |
| 4sealed | 94 | Watts, Patrick (1518) | Lost 1-2 | -171421 |
| 5sealed | 148 | Stensmyr, Peter (1388) | Lost 0-2 | -191402 |
| top | average opponent: 1474record: 2-3 | new rating: 1402 | ||
| Grand Prix Sydney 2006 (TSP limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | Tran, Huy (1500) | Won 1-0 | +191465 |
| 2sealed | 37 | Neeman, Jeremy (1570) | Lost 1-2 | -161449 |
| 3sealed | 34 | Clancy, Aaron (1498) | Lost 0-2 | -171432 |
| 4sealed | 84 | Phillips, Russell [AUS] (1517) | Lost 0-2 | -171415 |
| top | average opponent: 1522record: 1-3 | new rating: 1415 | ||
| Grand Prix Sydney 2003 (MRD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 19 | Windle, Richard (1500) | Won 2-1 | +181518 |
| 2sealed | 32 | Andres, Mark (1518) | Lost 1-2 | -181500 |
| 3sealed | 77 | Rowe, Chris [AUS] (1500) | Lost 0-2 | -181482 |
| 4sealed | 120 | Vandenberg, Benjamin (1481) | Lost 1-2 | -181464 |
| 5sealed | 113 | Lee, Homin (1464) | Lost 1-2 | -181446 |
| top | average opponent: 1493record: 1-4 | new rating: 1446 | ||