Giải quần vợt Úc Mở rộng 2019
Hạt giống đơn > Đơn nam

| Hạt giống | Xếp hạng | Tay vợt | Điểm trước thi đấu | Điểm bảo vệ | Điểm giành được | Điểm sau thi đấu | Thực trạng |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 1 |  Novak Djokovic | 9,135 | 180 | 2,000 | 10,955 | Champion, defeated  Rafael Nadal [2] |
| 2 | 2 |  Rafael Nadal | 7,480 | 360 | 1,200 | 8,320 | Runner-up, lost to  Novak Djokovic [1] |
| 3 | 3 |  Roger Federer | 6,420 | 2,000 | 180 | 4,600 | Fourth round lost to  Stefanos Tsitsipas [14] |
| 4 | 4 |  Alexander Zverev | 6,385 | 90 | 180 | 6,475 | Fourth round lost to  Milos Raonic [16] |
| 5 | 6 |  Kevin Anderson | 4,810 | 10 | 45 | 4,845 | Second round lost to  Frances Tiafoe |
| 6 | 7 |  Marin Čilić | 4,160 | 1,200 | 180 | 3,140 | Fourth round lost to  Roberto Bautista Agut [22] |
| 7 | 8 |  Dominic Thiem | 4,095 | 180 | 45 | 3,960 | Second round retired against  Alexei Popyrin [WC] |
| 8 | 9 |  Kei Nishikori | 3,750 | 0 | 360 | 4,110 | Quarterfinals retired against  Novak Djokovic [1] |
| 9 | 10 |  John Isner | 3,155 | 10 | 10 | 3,155 | First round lost to  Reilly Opelka |
| 10 | 11 |  Karen Khachanov | 2,835 | 45 | 90 | 2,880 | Third round lost to  Roberto Bautista Agut [22] |
| 11 | 12 |  Borna Ćorić | 2,435 | 10 | 180 | 2,605 | Fourth round lost to  Lucas Pouille [28] |
| 12 | 13 |  Fabio Fognini | 2,315 | 180 | 90 | 2,225 | Third round lost to  Pablo Carreño Busta [23] |
| 13 | 14 |  Kyle Edmund | 2,150 | 720 | 10 | 1,440 | First round lost to  Tomáš Berdych |
| 14 | 15 |  Stefanos Tsitsipas | 2,095 | 10 | 720 | 2,805 | Semifinals lost to  Rafael Nadal [2] |
| 15 | 19 |  Daniil Medvedev | 1,865 | 45 | 180 | 2,000 | Fourth round lost to  Novak Djokovic [1] |
| 16 | 17 |  Milos Raonic | 1,900 | 10 | 360 | 2,250 | Quarterfinals lost to  Lucas Pouille [28] |
| 17 | 18 |  Marco Cecchinato | 1,889 | (29)† | 10 | 1,870 | First round lost to  Filip Krajinović |
| 18 | 16 |  Diego Schwartzman | 1,925 | 180 | 90 | 1,835 | Third round lost to  Tomáš Berdych |
| 19 | 20 |  Nikoloz Basilashvili | 1,820 | 90 | 90 | 1,820 | Third round lost to  Stefanos Tsitsipas [14] |
| 20 | 21 |  Grigor Dimitrov | 1,790 | 360 | 180 | 1,610 | Fourth round lost to  Frances Tiafoe |
| 21 | 22 |  David Goffin | 1,785 | 45 | 90 | 1,830 | Third round lost to  Daniil Medvedev [15] |
| 22 | 24 |  Roberto Bautista Agut | 1,605 | 10 | 360 | 1,955 | Quarterfinals lost to  Stefanos Tsitsipas [14] |
| 23 | 23 |  Pablo Carreño Busta | 1,705 | 180 | 180 | 1,705 | Fourth round lost to  Kei Nishikori [8] |

| 24 | 25 |  Chung Hyeon | 1,585 | 720 | 45 | 910 | Second round lost to  Pierre-Hugues Herbert |
| 25 | 27 |  Denis Shapovalov | 1,440 | 45 | 90 | 1,485 | Third round lost to  Novak Djokovic [1] |
| 26 | 28 |  Fernando Verdasco | 1,410 | 45 | 90 | 1,455 | Third round lost to  Marin Čilić [6] |
| 27 | 29 |  Alex de Minaur | 1,353 | 0 | 90 | 1,443 | Third round lost to  Rafael Nadal [2] |
| 28 | 31 |  Lucas Pouille | 1,245 | 10 | 720 | 1,955 | Semifinals lost to  Novak Djokovic [1] |
| 29 | 30 |  Gilles Simon | 1,280 | 45 | 45 | 1,280 | Second round lost to  Alex Bolt [WC] |
| 30 | 33 |  Gaël Monfils | 1,195 | 45 | 45 | 1,195 | Second round lost to  Taylor Fritz |
| 31 | 34 |  Steve Johnson | 1,190 | 10 | 10 | 1,190 | First round lost to  Andreas Seppi |
| 32 | 32 |  Philipp Kohlschreiber | 1,215 | 10 | 45 | 1,250 | Second round lost to  João Sousa |

† Tay vợt không vượt qua vòng loại ở giải đấu năm 2018. Thay vào đó, điểm tốt nhất của lần 18 sẽ được thay thế vào.