De Gruyter, Johan
Current rating: 1755 (#3646)
Record: 25-12 (GP) / 3-5 (professional)
| Pro Tour Guilds of Ravnica (GRN standard) | starting rating: 1788 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 74 | Lechado Artigues, Pedro (1702) | Won 2-0 | +171805 |
| 2draft | 11 | Wu, Timothy (1939) | Lost 0-2 | -161789 |
| 3draft | 162 | Wasson, John (1708) | Lost 0-2 | -191770 |
| 4standard | 150 | Martos, Antonio (1763) | Lost 0-2 | -191751 |
| 5standard | 201 | Kassis, Eli (2001) | Lost 0-2 | -131738 |
| 6standard | 208 | Giucci, Leonardo (1724) | Lost 0-2 | -181720 |
| 7standard | 229 | Friedrichsen, Alex (1526) | Won 2-1 | +141734 |
| 8standard | 210 | Giorgio, Francesco (1905) | Won 2-0 | +211755 |
| top | average opponent: 1784record: 3-5 | new rating: 1755 | ||
| Grand Prix Birmingham 2018 (leg) (legacy) | starting rating: 1533 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 242 | Almeida, Keith (1678) | Won 2-1 | +201553 |
| 2legacy | 74 | Valkenberg, Anton (1526) | Won 2-1 | +181571 |
| 3legacy | 157 | Bachaud, Louis (1878) | Won 2-0 | +231594 |
| 4legacy | 132 | Hausmann, Marius (1661) | Won 2-1 | +201614 |
| 5legacy | 55 | Nieminen, Teemu (1568) | Won 2-0 | +171631 |
| 6legacy | 13 | Holm, Andreas (1685) | Won 2-1 | +191650 |
| 7legacy | 4 | Schuetz, Stefan (2002) | Won 2-1 | +241674 |
| 8legacy | 1 | Tiinus, Joona (1835) | Won 2-1 | +211695 |
| 9legacy | 5002 | Kowalski, Grzegorz (2247) | Lost 0-2 | -91686 |
| 10legacy | 5015 | Calligaro, Laurent (1946) | Won 2-1 | +231709 |
| 11legacy | 5007 | Campbell, Gary (1596) | Won 2-0 | +161725 |
| 12legacy | 5005 | Kennedy, Alastair (1736) | Won 2-0 | +181743 |
| 13legacy | 5002 | Muller, Lukas (1749) | Won 2-1 | +181761 |
| 14legacy | 5002 | Takahashi, Yuta (2151) | Won 2-1 | +251786 |
| 15legacy | 5001 | van der Ham, Peter (1861) | ID | 01786 |
| Qlegacy | Santos, Bernardo (2072) | Won 2-1 | +231809 | |
| Slegacy | Campbell, Gary (1666) | Lost 1-2 | -211788 | |
| top | average opponent: 1815record: 14-2-1 | new rating: 1788 | ||
| Grand Prix Prague 2016 (legacy) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 245 | Wolf, Stefan (1602) | Won 2-0 | +191546 |
| 4legacy | 166 | Kutscher, Ulrich (1716) | Won 2-0 | +211567 |
| 5legacy | 25 | Hayne, Alexander (2041) | Lost 1-2 | -101557 |
| 6legacy | 70 | Vuillot, Samuel (1856) | Lost 0-2 | -131544 |
| 7legacy | 220 | Bunka, Cyrill (1512) | Won 2-1 | +181562 |
| 8legacy | 82 | Kenyeres, Akos (1848) | Lost 0-2 | -131549 |
| 9legacy | 213 | Langer, Tim (1659) | Lost 0-2 | -161533 |
| top | average opponent: 1748record: 3-4 | new rating: 1533 | ||
| Grand Prix Lille 2015 (legacy) | starting rating: 1549 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 493 | Pensa, Nicolo (1500) | Lost 0-2 | -191530 |
| 2legacy | 422 | Fera, Fabio (1420) | Won 2-1 | +161546 |
| 3legacy | 394 | Pichon, Elie (1605) | Won 2-1 | +191565 |
| 4legacy | 438 | Andsjon, Jan Sindre (1475) | Lost 0-2 | -201545 |
| 5legacy | 505 | Cano Garcia, Jaime (1500) | Lost 1-2 | -181527 |
| top | average opponent: 1500record: 2-3 | new rating: 1527 | ||
| Grand Prix Antwerp 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 278 | Reinhardt, Stefan (1514) | Lost 0-2 | -181482 |
| 2modern | 520 | Klop, Eege (1482) | Won 2-0 | +181500 |
| 3modern | 477 | Willemaerts, Sam (1323) | Lost 0-2 | -211479 |
| 4modern | 629 | Mendes, Mario (1458) | Won 2-0 | +181497 |
| 5modern | 482 | Bouche, Arnaud (1432) | Lost 0-2 | -201477 |
| 6modern | 551 | Rehmann, Daniel (1380) | Won 2-1 | +171494 |
| 7modern | 441 | van Houts, Kevin (1529) | Won 2-0 | +181512 |
| 8modern | 266 | Valenti, Romain (1519) | Won 2-0 | +181530 |
| 9modern | 256 | Slaets, Glenn (1547) | Won 2-0 | +191549 |
| top | average opponent: 1465record: 6-3 | new rating: 1549 | ||