Head to Head
| Six Red World Championship 2019 | 2019/09/02 11:30 | Mark Williams v Thepchaiya Un-Nooh | 5-2 |
| Paul Hunter Classic 2019 | 2018/09/03 06:28 | Mark Williams v Thepchaiya Un-Nooh | 5-1 |
| Gibraltar Open 2019 | 2018/04/02 06:30 | Thepchaiya Un-Nooh v Mark Williams | 1-6 |
| Players Championship | 2015/03/25 13:45 | Mark Williams v Thepchaiya Un-Nooh | 4-1 |
| Shanghai Masters | 2014/08/15 18:00 | Mark Williams v Thepchaiya Un-Nooh | 5-3 |
Home History
| Snooker Shoot-Out 2021 | 2021/02/07 14:55 | Xiao Guodong v Mark Williams | 0-1 |
| Snooker Shoot-Out 2021 | 2021/02/06 15:00 | Hossein Vafaei v Mark Williams | 0-1 |
| Snooker Shoot-Out 2021 | 2021/02/04 19:00 | Paul Davies v Mark Williams | 0-1 |
| The Masters 2021 | 2021/01/11 19:00 | Shaun Murphy v Mark Williams | 6-4 |
| Scottish Open 2020 | 2020/12/10 21:05 | Judd Trump v Mark Williams | 4-1 |
| Scottish Open 2020 | 2020/12/10 13:30 | Mark Williams v Jackson Page | 4-1 |
| Scottish Open 2020 | 2020/12/09 19:15 | Mark Williams v Dominic Dale | 4-2 |
| Scottish Open 2020 | 2020/12/08 10:00 | Mark Williams v Lukas Kleckers | 4-3 |
Away History
| Snooker Shoot-Out 2021 | 2021/02/07 14:00 | Hamim Hussain v Thepchaiya Un-Nooh | 0-1 |
| Snooker Shoot-Out 2021 | 2021/02/06 13:00 | Thepchaiya Un-Nooh v John Higgins | 1-0 |
| Snooker Shoot-Out 2021 | 2021/02/05 15:30 | Thepchaiya Un-Nooh v Brandon Sargeant | 1-0 |
| WST Pro Series 2021 | 2021/01/24 20:00 | Thepchaiya Un-Nooh v Zhou Yuelong | 0-2 |
| WST Pro Series 2021 | 2021/01/24 18:30 | Thepchaiya Un-Nooh v Anthony Hamilton | 0-2 |
| WST Pro Series 2021 | 2021/01/24 17:00 | Thepchaiya Un-Nooh v Luo Honghao | 1-2 |
| WST Pro Series 2021 | 2021/01/24 15:30 | Thepchaiya Un-Nooh v Mitchell Mann | 1-2 |
| WST Pro Series 2021 | 2021/01/24 13:00 | Thepchaiya Un-Nooh v Peifan Lei | 0-2 |