Head to Head
| WST Pro Series 2021 | 2021/03/20 20:00 | Mark Selby v Ryan Day | 2-0 |
| Snooker Shoot-Out 2021 | 2021/02/07 22:45 | Mark Selby v Ryan Day | 0-1 |
| Championship League Snooker | 2019/10/09 11:00 | Mark Selby v Ryan Day | 3-0 |
| Championship League Snooker | 2019/10/08 13:45 | Mark Selby v Ryan Day | 3-2 |
| Championship League Snooker 2019 | 2019/01/10 14:00 | Ryan Day v Mark Selby | 1-3 |
| European Masters | 2018/10/04 14:25 | Mark Selby v Ryan Day | 2-4 |
| Players Championship | 2018/03/20 13:00 | Mark Selby v Ryan Day | 3-6 |
| Championship League Snooker | 2018/01/05 17:55 | Ryan Day v Mark Selby | 0-3 |
Home History
| World Grand Prix 2021 | 2021/12/15 21:20 | Mark Allen v Mark Selby | 2-4 |
| World Grand Prix 2021 | 2021/12/14 13:00 | Barry Hawkins v Mark Selby | 1-4 |
| Scottish Open 2021 | 2021/12/09 19:00 | Mark Selby v Anthony McGill | 3-4 |
| Scottish Open 2021 | 2021/12/08 21:10 | Mark Selby v Xiao Guodong | 4-2 |
| Scottish Open 2021 | 2021/12/07 13:00 | Mark Selby v Oliver Lines | 0-4 |
| Scottish Open Qualifiers 2021 | 2021/12/06 13:00 | Mark Selby v Sean Maddocks | 4-1 |
| UK Championship 2021 | 2021/11/28 19:00 | Hossein Vafaei v Mark Selby | 6-2 |
| UK Championship 2021 | 2021/11/24 14:30 | Mark Selby v Ross Muir | 6-2 |
Away History
| Scottish Open 2021 | 2021/12/09 14:10 | John Higgins v Ryan Day | 4-0 |
| Scottish Open 2021 | 2021/12/07 19:00 | Ryan Day v Gao Yang | 4-0 |
| UK Championship 2021 | 2021/11/25 19:30 | Ryan Day v Peter Lines | 3-6 |
| Champion of Champions 2021 | 2021/11/15 19:00 | Judd Trump v Ryan Day | 6-0 |
| Champion of Champions 2021 | 2021/11/15 15:10 | Stephen Maguire v Ryan Day | 2-4 |
| European Masters Qualifiers 2022 | 2021/10/31 19:00 | Ryan Day v Dominic Dale | 5-2 |
| German Masters Qualifiers 2022 | 2021/10/24 13:30 | Ryan Day v Jamie Clarke | 5-3 |
| German Masters Qualifiers 2022 | 2021/10/23 18:00 | Ryan Day v Jimmy White | 5-4 |