[16] Serena Williams 7-6,6-2 Maria Sakkari [41] 2018-12-31 04:30
Stadium: RAC Arena Round: 1 Ground: Hardcourt indoor
Home History
| Mubadala World Tennis Championship Women | 2018/12/27 16:05 | Serena Williams v Venus Williams | 6-4,3-6,8-10 |
| US Open Women | 2018/09/08 20:00 | Serena Williams v Naomi Osaka | 2-6,4-6 |
| US Open Women | 2018/09/06 23:10 | Serena Williams v Anastasija Sevastova | 6-3,6-0 |
| US Open Women | 2018/09/04 23:10 | Serena Williams v Karolina Pliskova | 6-4,6-3 |
| US Open Women | 2018/09/02 19:45 | Kaia Kanepi v Serena Williams | 0-6,6-4,3-6 |
| US Open Women | 2018/09/01 00:00 | Serena Williams v Venus Williams | 6-1,6-2 |
| US Open Women | 2018/08/29 23:05 | Serena Williams v Carina Witthoeft | 6-2,6-2 |
| US Open Women | 2018/08/28 00:00 | Serena Williams v Magda Linette | 6-4,6-0 |
Away History
| Hopman Cup Women | 2018/12/29 04:00 | Katie Boulter v Maria Sakkari | 0-6,6-4,2-6 |
| WTA Luxembourg | 2018/10/16 08:00 | Maria Sakkari v Margarita Betova | 1-6,6-7 |
| WTA Tianjin | 2018/10/09 07:05 | Katie Boulter v Maria Sakkari | 7-6,6-3 |
| WTA Beijing | 2018/09/29 06:25 | Maria Sakkari v Donna Vekic | 1-6,4-6 |
| WTA Wuhan | 2018/09/24 11:30 | Qiang Wang v Maria Sakkari | 7-5,6-2 |
| WTA Seoul | 2018/09/22 05:00 | Maria Sakkari v Kiki Bertens | 4-6,2-6 |
| WTA Seoul | 2018/09/21 11:20 | Irina-Camelia Begu v Maria Sakkari | 3-6,6-4,4-6 |
| WTA Seoul | 2018/09/19 03:00 | Margarita Betova v Maria Sakkari | 2-6,2-6 |