Stadium: Court 3 Round: 64 Ground: Clay
| Lugano, Switzerland | 2019/04/07 10:30 | Viktoriya Tomova v Haas, Barbara | 0-6,2-6 |
| Campinas, Singles Qualifying W-ITF-BRA-03A | 2019/03/28 16:10 | Haas, Barbara v Kostova, Elitsa | 6-1,2-6,0-6 |
| Campinas, Singles Qualifying W-ITF-BRA-03A | 2019/03/26 17:35 | Haas, Barbara v Marie Benoit | 6-3,6-2 |
| Curitiba, Singles Qualifying W-ITF-BRA-02A | 2019/03/19 21:05 | Gabriela Ce v Haas, Barbara | 6-4,6-2 |
| Sao Paulo, Singles W-ITF-BRA-01A | 2019/03/13 17:15 | Daniela Seguel v Haas, Barbara | 7-6,5-7,6-3 |
| Fed Cup, Groupe Mondial | 2019/02/09 16:55 | Haas, Barbara v Tahan, Maya | 6-0,7-6 |
| Fed Cup, Groupe Mondial | 2019/02/08 10:30 | Haas, Barbara v Husaric, Anita | 6-2,6-0 |
| Fed Cup, Groupe Mondial | 2019/02/06 10:25 | Haas, Barbara v Ons Jabeur | 6-1,2-6,0-6 |
| Lugano, Switzerland | 2019/04/07 10:30 | Leonie Kung v Lottner, Antonia | 0-6,1-6 |
| ITF W60 Croissy-Beaubourg | 2019/03/27 19:30 | Diatchenko, Vitalia v Lottner, Antonia | 6-1,6-3 |
| ITF W60 Croissy-Beaubourg | 2019/03/26 12:55 | Lesley Pattinama Kerkhove v Lottner, Antonia | 7-6,4-6,6-7 |
| ITF W25 Macon | 2019/02/28 09:00 | Lottner, Antonia v Georges, Myrtille | 7-6,3-6,6-7 |
| ITF W25 Macon | 2019/02/27 09:00 | Lottner, Antonia v Mariam Bolkvadze | 6-3,6-2 |
| ITF W25 Altenkirchen | 2019/02/20 18:00 | Lottner, Antonia v Paar, Laura-Ioana | 4-6,2-6 |
| Shrewsbury, Simples W-ITF-GBR-02A | 2019/02/12 10:00 | Arina Rodionova v Lottner, Antonia | 1-6,7-6,6-4 |
| ITF W60 Andrezieux-Boutheon | 2019/01/24 11:00 | Lottner, Antonia v Audrey Albie | 3-6,4-6 |