Head to Head
| UK Pro League | 2021/04/09 09:00 | Billy Harris v Julian Cash | 3-6,5-7 |
| UK Pro League | 2021/03/15 15:30 | Billy Harris v Julian Cash | 7-6,7-6 |
| LTA British Tour | 2020/10/03 13:30 | Julian Cash v Billy Harris | 6-7,3-6 |
| UK Tennis Series | 2020/08/16 07:00 | Julian Cash v Billy Harris | 3-6,6-3,10-4 |
| UK Tennis Series | 2020/07/31 14:30 | Billy Harris v Julian Cash | 7-5,6-2 |
| UK Tennis Series | 2020/07/23 09:00 | Billy Harris v Julian Cash | 7-6,6-2 |
Home History
| ITF M15 Antalya | 2021/06/13 07:30 | Billy Harris v Dian Nedev | 6-7,6-2,8-10 |
| ITF M15 Heraklion | 2021/06/12 07:00 | Yuki Mochizuki v Billy Harris | 6-2,3-6,6-3 |
| ITF M15 Heraklion | 2021/06/11 07:00 | William Griffith v Billy Harris | 2-6,6-7 |
| ITF M15 Heraklion | 2021/06/10 09:15 | Matas Vasiliauskas v Billy Harris | 3-6,6-3,1-6 |
| ITF M15 Heraklion | 2021/06/08 08:00 | Billy Harris v Ze Zhang | 6-2,6-2 |
| ITF M15 Heraklion | 2021/06/04 08:45 | Billy Harris v Ben Patael | 7-5,4-6,3-6 |
| ITF M15 Heraklion | 2021/06/03 09:00 | Billy Harris v Petros Tsitsipas | 4-6,6-0,7-6 |
| ITF M15 Heraklion | 2021/06/02 06:30 | Makoto Ochi v Billy Harris | 7-6,5-7,0-6 |
Away History
| ITF M15 Monastir | 2021/06/13 10:00 | Masamichi Imamura v Julian Cash | 6-4,6-4 |
| ITF M15 Heraklion | 2021/06/10 11:15 | William Griffith v Julian Cash | 7-5,7-6 |
| ITF M15 Heraklion | 2021/06/09 11:10 | Julian Cash v Takuto Niki | 6-1,1-6,6-3 |
| ITF M15 Heraklion | 2021/06/02 06:30 | Julian Cash v Ben Patael | 2-6,6-7 |
| ITF M15 Heraklion | 2021/06/01 06:30 | Joshua Paris v Julian Cash | 3-6,4-6 |
| ITF M15 Tbilisi | 2021/05/20 07:55 | Zane Khan v Julian Cash | 7-6,6-4 |
| ITF M15 Tbilisi | 2021/05/19 08:40 | Aleksandre Bakshi v Julian Cash | 7-6,5-7,2-6 |
| ITF M15 Tbilisi | 2021/05/18 05:30 | Julian Cash v Lorenzo Vatteroni | 6-2,6-3 |