Stadium: Centre Court Round: 28 Ground: Grass
| Australian Open Women | 2018/01/20 06:20 | Ashleigh Barty v Naomi Osaka | 4-6,2-6 |
| French Open Women | 2018/05/31 17:10 | Serena Williams v Ashleigh Barty | 3-6,6-3,6-4 |
| French Open Women | 2018/05/29 14:45 | Natalia Vikhlyantseva v Ashleigh Barty | 3-6,1-6 |
| WTA Strasbourg | 2018/05/24 09:00 | Ashleigh Barty v Qiang Wang | 7-5,6-4 |
| WTA Strasbourg | 2018/05/23 12:35 | Ashleigh Barty v Pauline Parmentier | 6-1,6-4 |
| WTA Strasbourg | 2018/05/21 12:30 | Ashleigh Barty v Luksika Kumkhum | 6-4,6-4 |
| WTA Rome | 2018/05/15 15:10 | Maria Sharapova v Ashleigh Barty | 7-5,3-6,6-2 |
| WTA Madrid | 2018/05/07 13:30 | Ashleigh Barty v Caroline Wozniacki | 2-6,6-4,4-6 |
| WTA Madrid | 2018/05/06 14:15 | Sara Errani v Ashleigh Barty | 1-6,4-6 |
| French Open Women | 2018/06/01 09:00 | Madison Keys v Naomi Osaka | 6-1,7-6 |
| French Open Women | 2018/05/30 09:00 | Zarina Diyas v Naomi Osaka | 4-6,5-7 |
| French Open Women | 2018/05/28 09:00 | Sofia Kenin v Naomi Osaka | 2-6,5-7 |
| WTA Rome | 2018/05/16 09:00 | Simona Halep v Naomi Osaka | 6-1,6-0 |
| WTA Rome | 2018/05/14 12:10 | Victoria Azarenka v Naomi Osaka | 0-6,3-6 |
| WTA Madrid | 2018/05/06 13:35 | Shuai Zhang v Naomi Osaka | 6-1,7-5 |
| 2018 Fed Cup | 2018/04/22 03:00 | Naomi Osaka v Johanna Konta | 3-6,3-6 |
| 2018 Fed Cup | 2018/04/21 04:00 | Naomi Osaka v Heather Watson | 6-2,6-3 |