Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| Gatineau, Canada | 2019/07/17 14:00 | Joao Menezes v Harris, Andrew | 4-6,6-3,6-4 |
| Challenger Winnipeg | 2019/07/11 17:45 | Harris, Andrew v Norbert Gombos | 6-4,2-6,3-6 |
| Challenger Winnipeg | 2019/07/10 19:10 | Harris, Andrew v Alexander Ritschard | 6-1,6-2 |
| Wimbledon, London, Great Britain | 2019/06/27 10:00 | Corentin Moutet v Harris, Andrew | 6-2,6-4,6-4 |
| Wimbledon, London, Great Britain | 2019/06/26 12:25 | Harris, Andrew v Stakhovsky, Sergiy | 3-6,6-3,6-3 |
| Wimbledon, London, Great Britain | 2019/06/24 10:00 | Lopez Perez v Harris, Andrew | 2-6,5-7 |
| Challenger - Nottingham | 2019/06/11 14:45 | Harris, Andrew v Bemelmans, Ruben | 3-6,2-6 |
| Surbiton, Great Britain | 2019/06/03 14:10 | Harris, Andrew v Klein, Brydan | 6-2,3-6,4-6 |
| Challenger Granby | 2019/07/23 14:00 | Mertens, Yannick v Ghasemi, Kooros | 6-2,6-0 |
| ATP Bastad | 2019/07/14 10:00 | Mertens, Yannick v Quiroz, Roberto | 1-6,2-6 |
| ITF M25 Ajaccio | 2019/07/11 15:00 | Laurent Lokoli v Mertens, Yannick | 6-1,6-4 |
| ITF M25 Ajaccio | 2019/07/10 15:40 | Peyrot, Alexandre v Mertens, Yannick | 6-3,3-6,6-7 |
| Palma Del Rio, Singles M-ITF-ESP-15A | 2019/06/27 18:45 | Ojeda Lara, Ricardo v Mertens, Yannick | 6-3,6-1 |
| Palma Del Rio, Singles M-ITF-ESP-15A | 2019/06/25 18:05 | Luque Rico, Enrique v Mertens, Yannick | 2-6,2-6 |
| ITF M25 Martos | 2019/06/22 15:00 | Mertens, Yannick v Struvay, Eduardo | 3-6,3-6 |
| ITF M25 Martos | 2019/06/21 16:40 | Sumit Sarkar v Mertens, Yannick | 6-7,4-6 |