| 2019 Davis Cup | 02/02 06:00 | - | Alex De Minaur v Damir Dzumhur | Cancelled | |
| 2019 Davis Cup | 02/01 07:10 | - | [28] Alex De Minaur v Mirza Basic [99] | 6-3,7-6 | |
| Australian Open | 01/18 08:00 | 25 | [29] Alex De Minaur v Rafael Nadal [2] | 1-6,2-6,4-6 | |
| Australian Open | 01/16 08:00 | 24 | [29] Alex De Minaur v Henri Laaksonen [166] | 6-4,6-2,6-7,4-6,6-3 | |
| Australian Open | 01/14 04:15 | 23 | [29] Alex De Minaur v Pedro Sousa [103] | 6-4,7-5,6-4 | |
| ATP Sydney | 01/12 08:00 | 29 | [37] Andreas Seppi v Alex De Minaur [29] | 5-7,6-7 | |
| ATP Sydney | 01/12 01:00 | 28 | [31] Gilles Simon v Alex De Minaur [29] | 3-6,2-6 | |
| ATP Sydney | 01/10 06:05 | 27 | [29] Alex De Minaur v Jordan Thompson [72] | 7-6,6-3 | |
| ATP Sydney | 01/09 02:00 | 26 | [29] Alex De Minaur v Reilly Opelka [102] | 6-4,7-6 | |
| ATP Sydney | 01/07 07:40 | 25 | [29] Alex De Minaur v Dusan Lajovic [45] | 6-4,6-3 | |
| ATP Brisbane | 01/04 10:40 | 27 | [239] Jo-Wilfried Tsonga v Alex De Minaur [31] | 6-4,7-6 | |
| ATP Brisbane | 01/02 09:00 | 26 | [72] Jordan Thompson v Alex De Minaur [31] | 4-6,2-6 | |
| ATP Brisbane | 01/01 10:25 | 25 | [147] Alexei Popyrin v Alex De Minaur [31] | 2-6,2-6 | |
| ATP Next Gen Finals | 11/10 20:05 | - | [15] Stefanos Tsitsipas v Alex De Minaur [31] | 2-4,4-1,4-3,4-3 | |
| ATP Next Gen Finals | 11/09 18:00 | - | [31] Alex De Minaur v Jaume Munar [76] | 3-4,4-1,4-1,3-4,4-2 | |
| ATP Next Gen Finals | 11/08 18:30 | 1 | [31] Alex De Minaur v Taylor Fritz [47] | 4-3,4-1,4-2 | |
| ATP Next Gen Finals | 11/07 20:00 | 1 | [31] Alex De Minaur v Andrey Rublev [68] | 4-1,3-4,4-1,4-2 | |
| ATP Next Gen Finals | 11/06 20:10 | 1 | Alex De Minaur v Liam Caruana | 4-1,4-1,4-2 | |
| ATP Paris | 10/29 15:15 | 24 | [71] Feliciano Lopez v Alex De Minaur [33] | 6-7,6-4,7-6 | |
| ATP Stockholm | 10/16 18:45 | 25 | [31] Alex De Minaur v Philipp Kohlschreiber [35] | 6-7,7-6,1-6 | |
| ATP Shanghai | 10/11 05:00 | - | [33] Alex De Minaur v Alexander Zverev [5] | 1-6,4-6 | |
| ATP Shanghai | 10/10 05:00 | 25 | [62] Benoit Paire v Alex De Minaur [33] | 4-6,3-6 | |
| ATP Shanghai | 10/09 05:00 | 24 | [82] Vasek Pospisil v Alex De Minaur [33] | 4-6,6-7 | |
| ATP Tokyo | 10/04 05:40 | - | [15] Stefanos Tsitsipas v Alex De Minaur [38] | 6-3,5-7,6-1 | |
| ATP Tokyo | 10/03 03:00 | - | [29] Gilles Simon v Alex De Minaur [38] | 7-6,6-7,2-6 | |
| ATP Shenzhen | 09/29 09:00 | - | [40] Alex De Minaur v Pierre-Hugues Herbert [67] | 5-7,6-2,6-7 | |
| ATP Shenzhen | 09/28 09:00 | - | [40] Alex De Minaur v Damir Dzumhur [39] | 6-3,7-6 | |
| ATP Shenzhen | 09/27 08:45 | - | [40] Alex De Minaur v Mackenzie McDonald [80] | 1-6,7-6,6-0 | |
| ATP Shenzhen | 09/25 14:05 | - | [40] Alex De Minaur v Yuichi Sugita [100] | 6-3,6-0 | |
| 2018 Davis Cup | 09/16 08:45 | - | [8] Dominic Thiem v Alex De Minaur [38] | 6-4,6-2,3-6,6-4 |