Clayton, Simon
Current rating: 1489
| Grand Prix Liverpool 2015 (FRF limited) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 292 | Santos, Hugo (1505) | Lost 0-2 | -181485 |
| 3sealed | 425 | Swingler, Roland (1518) | Won 2-0 | +191504 |
| 4sealed | 485 | Trickey, Adam (1500) | Won 2-1 | +181522 |
| 5sealed | 146 | Michlits, Mario (1680) | Lost 0-2 | -151507 |
| 6sealed | 476 | Horwood, Barry (1509) | Lost 1-2 | -181489 |
| top | average opponent: 1543record: 2-3 | new rating: 1489 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 96 | Tilley, John (1450) | Won 2-0 | +161535 |
| 3block | 96 | Asmussen, Allan (1602) | Lost 1-2 | -171518 |
| 4block | 96 | Dickson, Graeme (1516) | Won 2-0 | +181536 |
| 5block | 96 | Ward, Jonathan (1537) | Lost 0-2 | -181518 |
| 6block | 96 | Tuite, David (1380) | Won 2-1 | +161534 |
| 7block | 96 | Polak-Rottmann, Oliver (1883) | Lost 0-2 | -121522 |
| 8block | 96 | Boavida, Pedro (1480) | Lost 1-2 | -191503 |
| top | average opponent: 1550record: 3-4 | new rating: 1503 | ||
| Grand Prix London 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 128 | Corbet, Bryan (1383) | Won 2-1 | +161516 |
| 2sealed | 246 | Bergesen, Christian (1522) | Won 2-0 | +181534 |
| 3sealed | 108 | Lee, Wen Jie (1489) | Lost 0-2 | -191515 |
| 4sealed | 314 | Gascoyne, Sam (1517) | Won 2-0 | +181533 |
| 5sealed | 365 | Rossi, Kevin (1669) | Lost 1-2 | -151518 |
| 6sealed | 417 | Wat, Raymond (1419) | Won 2-1 | +161534 |
| 7sealed | 400 | Backeman, Peter (1545) | Lost 1-2 | -181516 |
| 8sealed | 343 | Pizzey, Lian (1694) | Lost 0-2 | -151501 |
| 9sealed | 324 | Weber, Wolfgang (1457) | Won 2-0 | +181519 |
| top | average opponent: 1522record: 5-4 | new rating: 1519 | ||