Head to Head
| ITF Great Britain F4 | 2018/09/13 09:30 | Billy Harris v Andrew Watson | 2-6,1-6 |
Home History
| LTA British Tour | 2020/10/04 10:45 | Anton Matusevich v Billy Harris | 6-2,6-3 |
| LTA British Tour | 2020/10/03 13:30 | Julian Cash v Billy Harris | 6-7,3-6 |
| LTA British Tour | 2020/10/03 10:15 | Michael Shaw v Billy Harris | 3-6,2-6 |
| LTA British Tour | 2020/10/02 14:25 | Patrick Foley v Billy Harris | 2-6,6-7 |
| LTA British Tour | 2020/09/05 09:00 | Billy Harris v Arthur Fery | 4-6,6-7 |
| LTA British Tour | 2020/09/04 11:30 | Billy Harris v Felix Gill | 6-1,4-6,10-8 |
| UK Tennis Series | 2020/08/16 07:00 | Julian Cash v Billy Harris | 3-6,6-3,10-4 |
| UK Tennis Series | 2020/08/15 13:00 | Arthur Fery v Billy Harris | 1-6,6-1,5-10 |
Away History
| ITF M25 Norman | 2019/10/01 17:20 | Andrew Watson v Strong Kirchheimer | 3-6,1-6 |
| ITF M25 Harlingen | 2019/09/27 00:30 | Adrian Andreev v Andrew Watson | 6-4,6-3 |
| ITF M25 Harlingen | 2019/09/26 02:55 | Zane Khan v Andrew Watson | 4-6,1-6 |
| ITF M25 Harlingen | 2019/09/25 18:30 | Zane Khan v Andrew Watson | 4-6,1-5 |
| ITF M25 Houston | 2019/09/20 00:00 | Dragos Constantin Ignat v Andrew Watson | 6-2,4-6,6-1 |
| ITF M25 Houston | 2019/09/18 19:00 | Jonathan Gray v Andrew Watson | 2-6,3-6 |
| ITF M15 Champaign | 2019/09/12 19:30 | Liam Draxl v Andrew Watson | 6-2,7-5 |
| ITF M15 Champaign | 2019/09/10 18:00 | Grey Hamilton v Andrew Watson | 1-6,1-6 |