Head to Head
| Players Championship | 2019/03/09 19:00 | Mark Allen v Ronnie O'Sullivan | 0-6 |
| UK Championship | 2018/12/09 13:00 | Ronnie O'Sullivan v Mark Allen | 10-6 |
| The Masters | 2018/01/18 13:05 | Ronnie O'Sullivan v Mark Allen | 1-6 |
| Gibraltar Open 2019 | 2016/12/15 21:15 | Mark Allen v Ronnie O'Sullivan | 2-4 |
| Champion of Champions | 2016/11/11 19:00 | Ronnie O'Sullivan v Mark Allen | 6-2 |
| Gibraltar Open 2019 | 2016/10/05 16:00 | Ronnie O'Sullivan v Mark Allen | 4-2 |
Home History
| Champion of Champions 2020 | 2020/11/05 14:15 | Mark Allen v Scott Donaldson | 4-3 |
| English Open 2020 | 2020/10/14 14:10 | Mark Allen v Robbie Williams | 0-4 |
| English Open 2020 | 2020/10/12 19:45 | Mark Allen v Mark King | 4-2 |
| Championship League Snooker | 2020/09/29 17:00 | Mark Allen v Luo Honghao | 2-2 |
| Championship League Snooker | 2020/09/29 15:00 | Mark Allen v Billy Joe Castle | 3-0 |
| Championship League Snooker | 2020/09/29 10:00 | Mark Allen v Jamie Wilson | 2-2 |
| European Masters 2020 | 2020/09/25 18:00 | Mark Allen v Ding Junhui | 2-5 |
| European Masters 2020 | 2020/09/25 09:00 | Mark Allen v Ashley Carty | 5-2 |
Away History
| Champion of Champions 2020 | 2020/11/05 13:00 | Ronnie O'Sullivan v Michael Holt | 4-1 |
| English Open 2020 | 2020/10/15 14:00 | Matthew Stevens v Ronnie O'Sullivan | 4-1 |
| English Open 2020 | 2020/10/14 18:00 | Ryan Day v Ronnie O'Sullivan | 1-4 |
| English Open 2020 | 2020/10/12 18:00 | Ronnie O'Sullivan v Brian Ochoiski | 4-2 |
| European Masters 2020 | 2020/09/24 18:00 | Aaron Hill v Ronnie O'Sullivan | 5-4 |
| UK Championship 2020 | 2020/09/21 08:43 | Stephen Hendry v Ronnie O'Sullivan | 0-0 |
| World Championship 2020 | 2020/08/15 12:30 | Kyren Wilson v Ronnie O'Sullivan | 8-18 |
| World Championship 2020 | 2020/08/14 18:00 | Ronnie O'Sullivan v Mark Selby | 17-16 |