| WTA Mallorca | 06/21 14:45 | 26 | [140] Lottner, Antonia v Anastasija Sevastova [20] | 6-1,3-6,1-6 | |
| WTA Mallorca | 06/19 09:00 | 25 | [140] Lottner, Antonia v Aliaksandra Sasnovich [51] | 6-4,6-0 | |
| WTA Mallorca Qual | 06/18 11:50 | 64 | [140] Lottner, Antonia v Ysaline Bonaventure [118] | 3-6,6-3,6-4 | |
| WTA Mallorca Qual | 06/17 11:45 | 45 | [87] Petkovic, Andrea v Lottner, Antonia [148] | 2-6,6-7 | |
| WTA Hertogenbosch | 06/15 14:30 | 27 | [81] Kuzmova, Viktoria v Lottner, Antonia [148] | 6-3,6-2 | |
| WTA Hertogenbosch | 06/14 17:05 | 26 | [148] Lottner, Antonia v Elise Mertens [15] | 7-5,6-3 | |
| WTA Hertogenbosch | 06/12 11:30 | 25 | [108] Anna Blinkova v Lottner, Antonia [148] | 2-6,6-3,2-6 | |
| s-Hertogenbosch, Netherlands, Qualifying | 06/10 10:20 | 64 | [147] Lottner, Antonia v Renata Zarazua [200] | 6-3,6-3 | |
| s-Hertogenbosch, Netherlands, Qualifying | 06/09 08:30 | 45 | [147] Lottner, Antonia v Urszula Radwanska [374] | 2-6,7-5,7-5 | |
| French Open Women Qual | 05/22 12:00 | 44 | [169] Sharipova, Sabina v Lottner, Antonia [149] | 6-2,6-4 | |
| ITF Women Trnava | 05/16 09:00 | 25 | [161] Tereza Martincova v Lottner, Antonia [147] | Retired | |
| WTA Prague | 05/02 09:00 | 26 | [158] Lottner, Antonia v Buzarnescu, Mihaela [37] | 0-6,6-7 | |
| WTA Prague | 05/01 09:00 | 25 | [66] Mona Barthel v Lottner, Antonia [158] | 0-6,5-7 | |
| WTA Prague Qual | 04/30 09:40 | 54 | [144] Jasmine Paolini v Lottner, Antonia [158] | 3-6,5-7 | |
| WTA Prague Qual | 04/29 10:55 | 46 | Stefkova, Barbora v Lottner, Antonia | 2-6,0-6 | |
| WTA Prague Qual | 04/28 09:30 | 45 | [318] Krejsova, Petra v Lottner, Antonia [155] | 4-6,3-6 | |
| WTA - Stuttgart | 04/24 09:30 | 25 | [158] Marta Kostyuk v Lottner, Antonia [155] | 6-4,6-1 | |
| WTA Lugano Qual | 04/09 15:35 | - | [150] Lottner, Antonia v Tamara Korpatsch [176] | 1-6,6-4,1-6 | |
| WTA Lugano Qual | 04/08 12:15 | 45 | [152] Lottner, Antonia v Veronika Kudermetova [190] | 4-6,7-5,6-4 | |
| Croissy-Beaubourg, Singles W-WITF-FRA-09A | 03/27 08:00 | 25 | [150] Lottner, Antonia v Muchova, Karolina [240] | 3-6,5-7 | |
| WTA Miami Qual | 03/19 14:00 | 44 | [70] Niculescu, Monica v Lottner, Antonia [150] | 6-4,6-0 | |
| WTA Budapest | 02/19 16:50 | 25 | Lottner, Antonia v Petra Martic | 4-6,2-6 | |
| Fed Cup, Groupe Mondial | 02/11 12:20 | 27 | Aryna Sabalenka v Lottner, Antonia | 6-3,5-7,6-2 | |
| Fed Cup, Groupe Mondial | 02/10 13:00 | 27 | Aliaksandra Sasnovich v Lottner, Antonia | 5-7,4-6 | |
| ITF Women Andrezieux-Boutheon | 01/23 11:10 | 25 | Lottner, Antonia v Audrey Albie | 3-6,2-6 | |
| Australian Open Women Qual | 01/12 00:30 | 45 | Lottner, Antonia v Anna Blinkova | 7-5,4-6,5-7 | |
| Australian Open Women Qual | 01/11 01:00 | 44 | Deborah Chiesa v Lottner, Antonia | 6-2,6-7,3-6 | |
| Brisbane, Australia, Qualifying | 12/29 00:00 | 45 | Lottner, Antonia v Ahn, Kristie | 5-7,1-6 | |
| WTA Limoges | 11/12 14:00 | 29 | [100] Niculescu, Monica v Lottner, Antonia [201] | 6-4,6-2 | |
| WTA Limoges | 11/11 17:05 | 28 | [268] Lisicki, Sabine v Lottner, Antonia [201] | Retired |