Head to Head
| World Championship 2022 | 2022/04/22 18:00 | Mark Allen v Ronnie O'Sullivan | 4-13 |
| Champion of Champions 2020 | 2020/11/05 19:00 | Mark Allen v Ronnie O'Sullivan | 6-3 |
| 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
| Riyadh Season Snooker Championship 2024 | 2024/12/19 22:00 | Ronnie O'Sullivan v Ding Junhui | 4-0 |
| UK Championship 2024 | 2024/11/23 13:15 | Ronnie O'Sullivan v Barry Hawkins | 4-6 |
| Champion of Champions 2024 | 2024/11/14 13:00 | Ronnie O'Sullivan v Xiao Guodong | 3-4 |
| International Championship 2024 | 2024/11/05 06:30 | Ronnie O'Sullivan v Pang Junxu | 4-6 |
| International Championship 2024 | 2024/11/04 06:30 | Ronnie O'Sullivan v He Guoqiang | 6-2 |
| International Championship Quals 2024 | 2024/11/03 06:50 | Ronnie O'Sullivan v Nutcharut Wongharuthai | 6-3 |
| English Open 2024 | 2024/09/17 18:00 | Ronnie O'Sullivan v He Guoqiang | 2-4 |
| Saudi Masters 2024 | 2024/09/05 17:05 | Ronnie O'Sullivan v Si Jiahui | 4-6 |
Away History
| Riyadh Season Snooker Championship 2024 | 2024/12/19 15:00 | Mark Selby v Mark Allen | 2-4 |
| Scottish Open 2024 | 2024/12/14 19:00 | Peifan Lei v Mark Allen | 6-5 |
| Scottish Open 2024 | 2024/12/13 19:00 | Noppon Saengkham v Mark Allen | 2-5 |
| Scottish Open 2024 | 2024/12/12 19:00 | Jack Lisowski v Mark Allen | 3-4 |
| Scottish Open 2024 | 2024/12/11 15:25 | Ryan Day v Mark Allen | 2-4 |
| Scottish Open 2024 | 2024/12/09 19:00 | Mark Allen v He Guoqiang | 4-1 |
| Snooker Shoot-Out 2024 | 2024/12/06 16:40 | Mark Allen v Si Jiahui | 0-1 |
| Snooker Shoot-Out 2024 | 2024/12/04 13:00 | Ross Muir v Mark Allen | 0-1 |