Face à face
| ITF Great Britain F4 | 2018/09/13 09:30 | Billy Harris v Watson, Andrew | 2-6,1-6 |
Home History
| UK Pro League | 2021/03/04 11:15 | Mark Whitehouse v Billy Harris | 3-6,6-3,5-10 |
| UK Pro League | 2021/03/03 17:00 | Billy Harris v George Houghton | 6-3,6-2 |
| UK Pro League | 2021/03/02 11:15 | Billy Harris v Daniel Cox | 1-6,4-6 |
| UK Pro League | 2021/03/01 17:00 | Billy Harris v Sean Hodkin | 6-4,6-2 |
| ITF - M15 Antalya | 2021/01/29 07:00 | Mora, Maxime v Billy Harris | 6-1,6-2 |
| ITF - M15 Antalya | 2021/01/28 08:00 | Geni Inoue v Billy Harris | 2-6,4-6 |
| ITF - M15 Antalya | 2021/01/21 12:10 | Rudolf Molleker v Billy Harris | 6-3,6-4 |
| ITF - M15 Antalya | 2021/01/20 14:10 | Billy Harris v Alex Rybakov | 6-4,6-4 |
Away History
| UK Pro League | 2021/03/04 10:00 | Watson, Andrew v Daniel Cox | 0-6,0-6 |
| UK Pro League | 2021/03/03 15:30 | Mark Whitehouse v Watson, Andrew | 7-6,6-2 |
| UK Pro League | 2021/03/02 12:30 | Watson, Andrew v Sean Hodkin | 2-6,3-6 |
| UK Pro League | 2021/03/01 14:00 | Watson, Andrew v George Houghton | 1-6,2-6 |
| ITF M25 Norman | 2019/10/01 17:20 | Watson, Andrew v Strong Kirchheimer | 3-6,1-6 |
| ITF M25 Harlingen | 2019/09/27 00:30 | Adrian Andreev v Watson, Andrew | 6-4,6-3 |
| ITF M25 Harlingen | 2019/09/26 02:55 | Khan, Zane v Watson, Andrew | 4-6,1-6 |
| ITF M25 Harlingen | 2019/09/25 18:30 | Khan, Zane v Watson, Andrew | 4-6,1-5 |