Mendonca, Justin
Current rating: 1436
Record: 14-21-1
| Grand Prix Pittsburgh 2018 (DOM standard) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 189 | Polglase, Samuel (1467) | Lost 0-2 | -171436 |
| top | record: 0-1 | new rating: 1436 | ||
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1438 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 376 | Schiven, Bryan (1500) | Won 2-1 | +201458 |
| 2standard | 156 | Schroeder, Paul (1518) | Lost 1-2 | -171441 |
| 3standard | 247 | Knapp, Steven (1505) | Won 2-1 | +191460 |
| 4standard | 304 | Gapinski, Trevor (1534) | Won 2-0 | +191479 |
| 5standard | 145 | Ferrando, Matthew (1682) | Lost 0-2 | -141465 |
| 6standard | 241 | Ingram, Peter (1837) | Lost 1-2 | -121453 |
| top | average opponent: 1596record: 3-3 | new rating: 1453 | ||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 34 | Dufour, David (1500) | Lost 1-2 | -171452 |
| 3sealed | 174 | Gamzu, Amir (1499) | Won 2-0 | +181470 |
| 4sealed | 154 | Schmaltz Tziritas, Mathew (1604) | Lost 1-2 | -151455 |
| 5sealed | 229 | Williams, Toby (1538) | Lost 0-2 | -171438 |
| top | average opponent: 1535record: 1-3 | new rating: 1438 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 222 | Bailie, Scott H (1582) | Won 2-1 | +201502 |
| 3sealed | 140 | Trattles, Ryan (1536) | Won 2-1 | +181520 |
| 4sealed | 41 | Goodson, Tony (1516) | Lost 0-2 | -181502 |
| 5sealed | 199 | Beverley, Robert (1692) | Lost 0-2 | -141488 |
| 6sealed | 261 | Potier, Robert (1456) | Lost 1-2 | -191469 |
| top | average opponent: 1556record: 2-3 | new rating: 1469 | ||
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 229 | Schneider, Brian (1559) | Won 2-1 | +191509 |
| 3extended | 30 | Carpenter, Brad (1514) | Lost 0-2 | -181491 |
| 4extended | 265 | Locke, Steve (1620) | Won 2-0 | +211512 |
| 5extended | 96 | Mason, Robert (1519) | Won 2-0 | +181530 |
| 6extended | 91 | McGee, Michael (1713) | Lost 0-2 | -151515 |
| 7extended | 161 | McGregor, Duncan (1637) | Lost 0-2 | -161499 |
| 8extended | 183 | Skarvelis, Theo (1523) | Lost 0-2 | -171482 |
| top | average opponent: 1584record: 3-4 | new rating: 1482 | ||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1460 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 209 | Muraca, Nick (1526) | Lost 0-2 | -171443 |
| 2block | 262 | Barnard, James (1482) | Won 2-1 | +191462 |
| 3block | 183 | Dubois, Joe (1493) | Won 2-1 | +181480 |
| 4block | 206 | Wood, Matthew E (1600) | Lost 1-2 | -161464 |
| 5block | 185 | Richardson, Paul (1419) | Won 2-0 | +181482 |
| 6block | 164 | Morgan, Sean (1526) | Won 2-1 | +181500 |
| 7block | 80 | Nakamura, Shuhei (1956) | Lost 0-2 | -101490 |
| top | average opponent: 1572record: 4-3 | new rating: 1490 | ||
| Grand Prix New Jersey 2006 (TSP limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 6 | Harvey, Eugene (1840) | Won 2-0 | +241524 |
| 5sealed | 29 | Schmaltz Tziritas, Mathew (1589) | Lost 1-2 | -171507 |
| 6sealed | 98 | Lauter, Michael (1661) | Lost 0-2 | -151492 |
| 7sealed | 170 | Schwarzott, Christopher (1538) | Draw 0-0 | +11493 |
| 8sealed | 139 | Bastos, Frederico (1611) | Lost 0-2 | -161477 |
| 9sealed | 131 | Newman, Travis A (1516) | Lost 1-2 | -171460 |
| top | average opponent: 1626record: 1-4-1 | new rating: 1460 | ||