Head to Head
| Gibraltar Open 2019 | 2018/03/22 19:00 | Ryan Day v Mark Williams | 3-6 |
| Gibraltar Open 2019 | 2017/12/04 13:10 | Mark Williams v Ryan Day | 5-6 |
| Gibraltar Open 2019 | 2017/10/31 11:30 | Ryan Day v Mark Williams | 2-6 |
| Gibraltar Open 2019 | 2017/08/18 11:30 | Ryan Day v Mark Williams | 0-5 |
| Riga Masters 2017 | 2017/06/25 12:55 | Ryan Day v Mark Williams | 5-4 |
| Championship League Snooker | 2017/02/22 15:20 | Mark Williams v Ryan Day | 3-2 |
| Championship League Snooker | 2017/02/20 17:50 | Mark Williams v Ryan Day | 2-3 |
| Championship League Snooker | 2017/01/11 13:55 | Mark Williams v Ryan Day | 3-1 |
Home History
| Snooker Shoot-Out 2021 | 2021/02/07 21:45 | Martin O'Donnell v Mark Williams | 0-1 |
| Snooker Shoot-Out 2021 | 2021/02/07 19:00 | Mark Williams v Thepchaiya Un-Nooh | 1-0 |
| 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 |
| Mistři 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 |
Away History
| Snooker Shoot-Out 2021 | 2021/02/07 21:05 | Ryan Day v David Gilbert | 1-0 |
| Snooker Shoot-Out 2021 | 2021/02/07 20:30 | Zhou Yuelong v Ryan Day | 0-1 |
| Snooker Shoot-Out 2021 | 2021/02/07 14:45 | Ryan Day v Ben Hancorn | 1-0 |
| Snooker Shoot-Out 2021 | 2021/02/06 21:15 | Ryan Day v Ashley Carty | 1-0 |
| Snooker Shoot-Out 2021 | 2021/02/05 19:45 | Ryan Day v Matthew Selt | 1-0 |
| German Masters 2021 | 2021/01/27 19:00 | Barry Hawkins v Ryan Day | 5-4 |
| Scottish Open 2020 | 2020/12/08 19:00 | Ali Carter v Ryan Day | 4-2 |
| Northern Ireland Open 2020 | 2020/11/19 13:00 | Kurt Maflin v Ryan Day | 4-1 |