| ITF Women Macon | 10/24 18:05 | 25 | [342] Louisa Chirico v Beatriz Haddad Maia [232] | 7-6,6-4 | |
| ITF Women Stockton | 10/03 17:30 | 25 | [196] Beatriz Haddad Maia v Sesil Karatantcheva [233] | Retired | |
| ITF Women Templeton | 09/25 19:30 | 25 | [272] Katherine Sebov v Beatriz Haddad Maia [187] | 6-2,6-2 | |
| WTA Quebec City | 09/10 23:20 | 25 | [126] Beatriz Haddad Maia v Monica Puig [50] | 2-6,3-6 | |
| WTA Chicago | 09/04 20:40 | 25 | [82] Johanna Larsson v Beatriz Haddad Maia [130] | 6-4,1-6,7-6 | |
| US Open - Kobiety | 08/23 20:45 | 45 | [210] Francoise Abanda v Beatriz Haddad Maia [132] | 7-6,6-3 | |
| US Open - Kobiety | 08/22 16:35 | 44 | [159] Olivia Rogowska v Beatriz Haddad Maia [132] | 6-7,1-6 | |
| ITF Women Vancouver | 08/16 17:00 | 26 | [116] Beatriz Haddad Maia v Alexandra Dulgheru [148] | 5-7,6-7 | |
| ITF Women Vancouver | 08/15 17:00 | 25 | [116] Beatriz Haddad Maia v Carol Zhao [143] | 6-3,6-1 | |
| WTA Madrid Qual | 05/04 15:50 | 45 | [63] Beatriz Haddad Maia v Sara Errani [89] | 4-6,6-7 | |
| WTA Praga | 05/01 10:40 | 25 | [63] Beatriz Haddad Maia v Mihaela Buzarnescu [37] | 1-6,5-7 | |
| WTA Charleston | 04/03 15:00 | 24 | [63] Beatriz Haddad Maia v Lara Arruabarrena [84] | Retired | |
| WTA Miami | 03/25 19:30 | 25 | [5] Jelena Ostapenko v Beatriz Haddad Maia [64] | 6-2,7-6 | |
| WTA Miami | 03/23 16:30 | 24 | [64] Beatriz Haddad Maia v Shuai Zhang [30] | 6-3,6-2 | |
| WTA Miami | 03/20 17:05 | 23 | [64] Beatriz Haddad Maia v Heather Watson [72] | 7-6,6-2 | |
| WTA Indian Wells | 03/08 19:00 | 23 | Monica Puig v Beatriz Haddad Maia | 6-3,7-6 | |
| WTA Acapulco | 03/01 00:10 | 26 | Beatriz Haddad Maia v Kristina Mladenovic | 6-3,3-6,5-7 | |
| WTA Acapulco | 02/28 00:20 | 25 | Beatriz Haddad Maia v Heather Watson | 7-5,4-6,6-1 | |
| 2018 Fed Cup | 02/10 18:35 | 29 | Veronica Cepede Royg v Beatriz Haddad Maia | 6-7,7-5,7-6 | |
| 2018 Fed Cup | 02/09 18:50 | 1 | Catalina Pella v Beatriz Haddad Maia | 2-6,6-4,4-6 | |
| 2018 Fed Cup | 02/08 18:30 | 1 | Beatriz Haddad Maia v Kirsten-Andrea Weedon | 6-1,6-1 | |
| 2018 Fed Cup | 02/07 20:00 | 1 | Beatriz Haddad Maia v Andrea Gamiz | 7-6,6-4 | |
| Australian Open - Kobiety | 01/18 02:55 | 24 | Beatriz Haddad Maia v Karolina Pliskova | 1-6,1-6 | |
| Australian Open - Kobiety | 01/16 02:30 | 23 | Lizette Cabrera v Beatriz Haddad Maia | 6-7,4-6 | |
| WTA Hobart | 01/09 03:55 | 26 | Beatriz Haddad Maia v Elise Mertens | 4-6,4-6 | |
| WTA Hobart | 01/07 01:00 | 25 | Beatriz Haddad Maia v Lizette Cabrera | 6-3,6-2 | |
| WTA Auckland | 01/02 04:15 | 25 | Agnieszka Radwanska v Beatriz Haddad Maia | 6-2,4-6,6-2 | |
| WTA Luksemburg | 10/18 11:00 | 26 | [58] Beatriz Haddad Maia v Johanna Larsson [79] | 6-3,6-7,2-6 | |
| WTA Luksemburg | 10/16 16:00 | 25 | [58] Beatriz Haddad Maia v Kirsten Flipkens [75] | 6-3,6-4 | |
| WTA Tianjin | 10/12 05:40 | 26 | [280] Sara Errani v Beatriz Haddad Maia [58] | 6-4,4-6,6-3 |