| WTA Doha | 02/25 17:45 | 25 | [16] Garbiñe Muguruza v Ajla Tomljanovic [54] | 6-1,6-2 | |
| WTA Doha | 02/23 14:05 | 24 | [132] Priscilla Hon v Ajla Tomljanovic [55] | 2-6,4-6 | |
| WTA Dubai | 02/15 09:40 | 44 | [385] Bethanie Mattek-Sands v Ajla Tomljanovic [57] | 6-4,3-6,7-6 | |
| WTA San Petersburgo | 02/12 11:25 | 26 | [57] Ajla Tomljanovic v Anastasia Potapova [101] | 6-7,3-6 | |
| WTA San Petersburgo | 02/11 11:25 | 25 | [17] Marketa Vondrousova v Ajla Tomljanovic [57] | 6-3,3-6,4-6 | |
| Open de Australia - Femenino | 01/23 00:00 | 24 | [32] Garbiñe Muguruza v Ajla Tomljanovic [52] | 6-3,3-6,6-3 | |
| Open de Australia - Femenino | 01/21 04:45 | 23 | [52] Ajla Tomljanovic v Anastasija Sevastova [33] | 6-1,6-1 | |
| Kooyong Classic - Femenino | 01/16 04:40 | 1 | [145] Maria Sharapova v Ajla Tomljanovic [52] | 1-6,6-1,9-11 | |
| WTA Adelaida | 01/14 08:00 | 26 | [52] Ajla Tomljanovic v Simona Halep [4] | 4-6,5-7 | |
| WTA Adelaida | 01/13 00:30 | 25 | [37] Yulia Putintseva v Ajla Tomljanovic [52] | 6-7,2-6 | |
| WTA Brisbane | 01/09 02:50 | 26 | [54] Ajla Tomljanovic v Karolina Pliskova [2] | 4-6,7-6,1-6 | |
| WTA Brisbane | 01/06 08:10 | 25 | [54] Ajla Tomljanovic v Priscilla Hon [122] | 6-2,4-6,6-4 | |
| Mubadala WTC - Femenino | 12/19 16:00 | 29 | [131] Maria Sharapova v Ajla Tomljanovic [51] | 6-4,7-5 | |
| 2019 Fed Cup | 11/10 05:50 | - | [51] Ajla Tomljanovic v Pauline Parmentier [122] | 6-4,7-5 | |
| 2019 Fed Cup | 11/10 05:50 | 29 | Ajla Tomljanovic v Caroline Garcia | Cancelled | |
| 2019 Fed Cup | 11/09 03:00 | 29 | [51] Ajla Tomljanovic v Kristina Mladenovic [40] | 1-6,1-6 | |
| WTA Moscú | 10/15 12:50 | 25 | [121] Varvara Gracheva v Ajla Tomljanovic [51] | 6-3,6-2 | |
| WTA Tianjín | 10/08 06:55 | 25 | [45] Veronika Kudermetova v Ajla Tomljanovic [50] | 6-4,6-2 | |
| WTA Pek�n | 10/01 08:45 | 25 | [52] Ajla Tomljanovic v Alison Riske [24] | 3-6,6-3,4-6 | |
| WTA Pek�n | 09/29 13:45 | 24 | [16] Qiang Wang v Ajla Tomljanovic [49] | Retired | |
| WTA Wuhan | 09/22 04:10 | 24 | [42] Ajla Tomljanovic v Dayana Yastremska [28] | 6-7,2-6 | |
| WTA Seúl | 09/19 03:00 | 26 | [119] Priscilla Hon v Ajla Tomljanovic [42] | 6-3,5-7,6-1 | |
| WTA Seúl | 09/17 06:30 | 25 | [118] Stefanie Voegele v Ajla Tomljanovic [42] | 0-6,2-6 | |
| WTA Zhengzhou | 09/14 06:00 | 28 | [2] Karolina Pliskova v Ajla Tomljanovic [46] | 6-3,6-2 | |
| WTA Zhengzhou | 09/13 08:30 | 27 | [46] Ajla Tomljanovic v Saisai Zheng [38] | 6-1,6-7,6-4 | |
| WTA Zhengzhou | 09/13 03:00 | 26 | [8] Kiki Bertens v Ajla Tomljanovic [46] | 4-6,6-7 | |
| WTA Zhengzhou | 09/10 07:50 | 25 | [46] Ajla Tomljanovic v Lesley Pattinama Kerkhove [168] | 6-2,6-0 | |
| US Open - Femenino | 08/29 17:15 | 24 | [21] Anett Kontaveit v Ajla Tomljanovic [47] | 4-6,7-5,6-2 | |
| US Open - Femenino | 08/27 20:25 | 23 | [47] Ajla Tomljanovic v Marie Bouzkova [56] | 1-6,7-5,6-1 | |
| WTA Nueva York | 08/19 16:40 | 25 | Coco Vandeweghe v Ajla Tomljanovic | Cancelled |