| ATP Pune | 01/30 10:10 | 14 | [395] Harris, Andrew v Jay Clarke [185] | 1-6,3-6 | |
| Open d'Australie | 01/11 01:20 | 14 | [199] Flavio Cobolli v Harris, Andrew [397] | 7-6,4-6,6-3 | |
| ATP Murray River Open | 02/03 09:25 | 25 | [232] Harris, Andrew v Grigor Dimitrov [19] | 3-6,3-6 | |
| ATP Murray River Open | 02/02 06:35 | 24 | [232] Harris, Andrew v Taro Daniel [117] | 5-7,6-4,7-5 | |
| Open d'Australie | 01/12 12:50 | 15 | [111] Hugo Dellien v Harris, Andrew [232] | 6-4,7-6 | |
| Open d'Australie | 01/11 07:30 | 60 | [232] Harris, Andrew v Bemelmans, Ruben [225] | 6-4,5-7,6-3 | |
| Challenger - Hambourg | 10/24 09:20 | 26 | Max Wiskandt v Harris, Andrew | Cancelled | |
| Alicante, Spain | 10/13 08:00 | 25 | Harris, Andrew v Steven Diez | Cancelled | |
| Challenger Biella | 09/28 12:00 | 25 | [216] Harris, Andrew v Chun Hsin Tseng [287] | 1-6,2-6 | |
| French Open, Paris, France | 09/22 08:00 | 14 | [213] Harris, Andrew v Constant Lestienne [221] | 1-6,1-6 | |
| Monterrey, Mexico | 03/05 23:25 | 26 | [54] Andujar, Pablo v Harris, Andrew [204] | 6-2,6-2 | |
| Monterrey, Mexico | 03/04 19:35 | 25 | [428] Caruana, Liam v Harris, Andrew [204] | 3-6,1-6 | |
| Challenger Columbus | 02/25 17:25 | 25 | [275] Quiroz, Roberto v Harris, Andrew [188] | 7-6,4-6,6-1 | |
| Drummondville, Canada | 02/20 15:00 | 26 | [190] Harris, Andrew v Kamke, Tobias [254] | 3-6,6-7 | |
| Drummondville, Canada | 02/18 16:50 | 25 | [190] Harris, Andrew v Lucas Catarina [482] | 3-6,6-4,6-1 | |
| Challenger - Burnie | 01/28 23:00 | 25 | [162] Harris, Andrew v Daniel Altmaier [263] | 3-6,4-6 | |
| Open d'Australie | 01/20 00:00 | 23 | [8] Matteo Berrettini v Harris, Andrew [162] | 6-3,6-1,6-3 | |
| ATP - Adelaïde | 01/11 00:50 | 64 | [83] Gregoire Barrere v Harris, Andrew [160] | 6-1,6-3 | |
| Challenger Canberra | 01/08 00:20 | 25 | [110] Evgeny Donskoy v Harris, Andrew [160] | 6-3,7-6 | |
| Challenger Canberra | 01/06 06:35 | 24 | [152] Marius Copil v Harris, Andrew [160] | 6-4,5-7,6-7 | |
| Open d'Australie Playoff Wilcard Australienne | 12/08 23:00 | 26 | Tristan Schoolkate v Harris, Andrew | 4-6,7-6,6-2,3-6,6-2 | |
| Playford City II, Australie | 11/01 00:00 | 27 | [86] Yasutaka Uchiyama v Harris, Andrew [160] | Retired | |
| Playford City II, Australie | 10/31 01:10 | 26 | [222] Max Purcell v Harris, Andrew [160] | 6-4,5-7,2-6 | |
| Playford City II, Australie | 10/30 03:15 | 25 | Dane Sweeny v Harris, Andrew | 3-6,2-6 | |
| Challenger Traralgon | 10/27 04:00 | 29 | [154] Marc Polmans v Harris, Andrew [189] | 7-5,6-3 | |
| Challenger Traralgon | 10/26 06:15 | 28 | [189] Harris, Andrew v Tatsuma Ito [137] | 4-6,7-6,7-6 | |
| Challenger Traralgon | 10/25 03:00 | 27 | [189] Harris, Andrew v James Duckworth [133] | 6-3,6-3 | |
| Challenger Traralgon | 10/24 00:55 | 26 | [189] Harris, Andrew v Akira Santillan [245] | Retired | |
| Challenger Traralgon | 10/23 00:25 | 25 | [189] Harris, Andrew v Lucas Gerch [460] | 6-2,6-3 | |
| Ningbo, China | 10/16 03:35 | 25 | [186] Harris, Andrew v Nam, Ji Sung [275] | 3-6,5-7 |