Stadium: Court 4 Round: 25 Ground: Clay
| ITF W25 - Altenkirchen | 2021/02/18 13:10 | Cristina Bucsa v Katharina Gerlach | 6-1,6-3 |
| ITF W25 - Altenkirchen | 2021/02/17 09:30 | Dalma Galfi v Katharina Gerlach | 6-7,3-6 |
| ITF W25 - Altenkirchen | 2021/02/15 14:20 | Katharina Gerlach v Simona Waltert | 1-6,0-6 |
| ITF W25 - Altenkirchen | 2021/02/14 12:30 | Katharina Gerlach v Shiho Akita | 6-0,5-7,10-8 |
| ITF W60 Rome, GA | 2021/01/28 00:10 | Irene Burillo Escorihuela v Katharina Gerlach | 3-6,6-2,6-1 |
| ITF W25 - Fujairah | 2021/01/19 09:45 | Katharina Gerlach v Xinyu Wang | 1-6,2-6 |
| ITF W25 - Fujairah | 2021/01/18 07:35 | Katharina Gerlach v Marija Semenistaja | 6-0,6-0 |
| Australian Open - Dames | 2021/01/12 13:25 | Katharina Gerlach v Mayo Hibi | 3-6,4-6 |
| ITF - W15 Manacor | 2021/03/12 09:00 | Leyre Romero Gormaz v Diana Marcinkevica | 7-6,2-6,6-4 |
| ITF - W15 Manacor | 2021/03/11 10:50 | Tereza Mihalikova v Diana Marcinkevica | 2-6,2-6 |
| ITF - W15 Manacor | 2021/03/10 11:10 | Maria G Carrasco v Diana Marcinkevica | 4-6,4-6 |
| ITF W25 Manacor | 2021/03/03 08:55 | Diana Marcinkevica v Jana Fett | 6-3,3-6,3-6 |
| ITF W25 - Poitiers | 2021/02/23 14:30 | Clara Burel v Diana Marcinkevica | 6-4,6-2 |
| ITF W25 - Altenkirchen | 2021/02/15 11:00 | Diana Marcinkevica v Susan Bandecchi | 6-3,2-6,7-10 |
| ITF W25 - Altenkirchen | 2021/02/14 16:00 | Diana Marcinkevica v Tayisiya Morderger | 6-2,6-1 |
| ITF W25 - Grenoble | 2021/02/07 08:00 | Diana Marcinkevica v Audrey Albie | 3-6,7-6,6-10 |