Marshall, David
Current rating: 1513
Record: 10-8 (GP) / 5-9 (professional)
| Pro Tour Nagoya 2011 (Scars block) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 27 | Sajgalik, Eduardo (1710) | Won 2-1 | +221519 |
| 2block | 9 | Yu, Pi Hsiang (1651) | Won 2-1 | +201539 |
| 3block | 30 | Pichon, Elie (1652) | Lost 0-2 | -161523 |
| 4block | 31 | Frantuma, Marco (1655) | Won 2-1 | +211544 |
| 5block | 26 | Folinus, Jeff (1706) | Lost 1-2 | -161528 |
| 6draft | 77 | Dictus, Mark (1682) | Lost 0-2 | -151513 |
| 7draft | 56 | Petterson, John (1496) | Won 2-0 | +181531 |
| 8draft | 100 | Vodopyanov, Igor (1535) | Lost 1-2 | -181513 |
| top | average opponent: 1636record: 4-4 | new rating: 1513 | ||
| Pro Tour Amsterdam 2010 (extended) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 156 | Lemaitre, Benoist (1520) | Won 2-1 | +181572 |
| 2extended | 40 | Kolomeyko, Yuri (1854) | Lost 1-2 | -131559 |
| 3extended | 168 | Angeli, Alessio (1745) | Lost 0-2 | -151544 |
| 4extended | 122 | Mygh, Sebastian (1676) | Lost 0-2 | -151529 |
| 5extended | 163 | Dores, Pedro (1563) | Lost 0-2 | -181511 |
| 6draft | 202 | Barclay, Bradley (1715) | Lost 0-2 | -141497 |
| top | average opponent: 1679record: 1-5 | new rating: 1497 | ||
| Grand Prix Melbourne 2009 (ZEN limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 47 | Jois, Vidya (1457) | Won 2-0 | +171535 |
| 5sealed | 9 | Lim-Joon, Gavan (1573) | Lost 1-2 | -171518 |
| 6sealed | 19 | Ong Kit Teck, Bryan (1501) | Won 2-0 | +181536 |
| 7sealed | 24 | Siagian, Yohannes (1415) | Won 2-0 | +151551 |
| 8sealed | 5 | Wiebell, Daniel (1598) | Won 2-0 | +191570 |
| 9draft | 38 | Piotto, Joel (1592) | Won 2-0 | +191589 |
| 10draft | 40 | Dalliston, Shane (1737) | Lost 0-2 | -161573 |
| 11draft | 36 | Hortle, Linden (1583) | Lost 0-2 | -171556 |
| 12draft | 7 | Caley, Dan (1605) | Lost 1-2 | -181538 |
| 13draft | 7 | Scott-Vargas, Luis (2113) | Won 2-1 | +281566 |
| 14draft | 28 | Nakamura, Shuhei (1944) | Lost 0-2 | -121554 |
| top | average opponent: 1647record: 6-5 | new rating: 1554 | ||
| Grand Prix Auckland 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 52 | Patterson, Flynn (1500) | Won 2-0 | +181518 |
| 2sealed | 54 | Constantine, Ranjith (1518) | Lost 1-2 | -181500 |
| 3sealed | 65 | Amith, Itamar (1497) | Won 2-1 | +181518 |
| 4sealed | 66 | Anderson, Micheal J (1518) | Lost 1-2 | -181500 |
| 5sealed | 65 | Graham, Eliot (1439) | Won 2-0 | +171517 |
| 6sealed | 74 | Zhang, Michael (1501) | Won 2-0 | +181535 |
| 7sealed | 53 | Rayson, Shawn (1632) | Lost 1-2 | -171518 |
| top | average opponent: 1515record: 4-3 | new rating: 1518 | ||