| ITF Women Leipzig | 08/15 09:00 | 25 | [333] Jesika Maleckova v Vivian Heisen [460] | 6-1,6-1 | |
| ITF Women Leipzig | 08/13 16:30 | 44 | Rosa Vicens Mas v Vivian Heisen | 6-3,3-6,4-6 | |
| ITF Women Leipzig | 08/13 09:00 | 44 | Vivian Heisen v Anna Gabric | 7-6,6-3 | |
| ITF Women Leipzig | 08/12 09:00 | 44 | Gabriela Horackova v Vivian Heisen | 7-5,4-6,1-6 | |
| ITF Women Koksijde | 08/07 09:10 | 25 | [306] Marie Benoit v Vivian Heisen [429] | 6-0,2-6,6-3 | |
| ITF Women Bad Saulgau | 08/01 12:05 | 25 | [248] Julia Grabher v Vivian Heisen [427] | 6-2,6-3 | |
| WTA Moscow Qual | 07/22 09:40 | 45 | [407] Vivian Heisen v Olga Danilovic [194] | 4-6,4-6 | |
| ITF Women Astana | 07/17 04:00 | 25 | Sabina Sharipova v Vivian Heisen | 5-7,6-1,6-3 | |
| ITF Women Torino | 07/11 09:00 | 26 | [385] Vivian Heisen v Anastasia Zarycka [315] | 6-4,4-6,1-6 | |
| ITF Women Torino | 07/10 10:05 | 25 | [385] Vivian Heisen v Alice Rame [490] | 6-2,6-3 | |
| ITF Women Aschaffenburg | 07/04 15:45 | 25 | [240] Anna Zaja v Vivian Heisen [385] | 6-4,6-1 | |
| ITF Women Ystad | 06/19 12:25 | 25 | Michele Alexandra Zmau v Vivian Heisen | 7-6,6-1 | |
| ITF Women Surbiton Qual | 06/02 12:00 | 54 | [414] An-Sophie Mestach v Vivian Heisen [342] | 6-4,7-6 | |
| ITF Women Grado Qual | 05/27 13:55 | 54 | Vivian Heisen v Maja Chwalinska | 2-6,3-6 | |
| ITF Women Caserta | 05/21 12:05 | 25 | [422] Alice Matteucci v Vivian Heisen [345] | 6-3,6-3 | |
| ITF Women Khimki | 05/01 08:15 | 25 | [303] Julia Glushko v Vivian Heisen [341] | 6-3,6-2 | |
| ITF Women Wiesbaden | 04/25 09:00 | 25 | [317] Ekaterine Gorgodze v Vivian Heisen [347] | 6-2,6-4 | |
| ITF Women Obidos | 04/19 09:00 | 26 | [262] Giulia G-Monticone v Vivian Heisen [346] | 6-0,6-0 | |
| ITF Women Obidos | 04/18 09:00 | 25 | Rita Maria B D O Pinto v Vivian Heisen | 2-6,0-6 | |
| ITF Women Obidos | 04/11 14:35 | 25 | [348] Vivian Heisen v Stefania Rubini [311] | 2-6,2-6 | |
| ITF Women Trnava | 02/09 13:10 | 27 | Elena Rybakina v Vivian Heisen | 6-4,6-2 | |
| ITF Women Trnava | 02/08 11:30 | 26 | Nina Stankovska v Vivian Heisen | 1-6,4-6 | |
| ITF Women Trnava | 02/07 14:10 | 25 | Kiara Petrovicka v Vivian Heisen | 3-6,3-6 | |
| ITF Women Dubai Qual | 12/09 06:30 | 45 | [335] Vivian Heisen v Valeria Savinykh [273] | Cancelled | |
| WTA Taipei Qual | 11/12 04:45 | 45 | [188] Vitalia Diatchenko v Vivian Heisen [338] | 6-3,6-2 | |
| WTA Hua Hin Qual | 11/04 03:00 | 45 | [333] Vivian Heisen v Emina Bektas [254] | 4-6,4-6 | |
| ITF Women Brisbane | 09/28 03:20 | 26 | [333] Vivian Heisen v Olivia Tjandramulia [412] | Retired | |
| ITF Women Brisbane | 09/27 03:40 | 25 | Ramu Ueda v Vivian Heisen | 1-6,4-6 | |
| ITF Women St. Petersburg | 09/19 09:20 | 25 | [295] Ysaline Bonaventure v Vivian Heisen [334] | 6-3,7-6 | |
| ITF Women St. Petersburg Qual | 09/18 08:25 | 54 | Vivian Heisen v Olga Puchkova | 6-3,3-6,6-4 |