Stadium: Central Court Round: 44 Ground: Clay
| ITF W15 Santa Margarita de Montbui | 2021/05/26 09:00 | de Las Heras Armenteras, Claudia v Nahia Berecoechea | 2-6,4-6 |
| ITF W25 SM de Montbui | 2021/05/25 09:00 | Retortillo Soiras, Alba v de Las Heras Armenteras, Claudia | 1-6,6-7 |
| ITF W25 SM de Montbui | 2021/05/24 09:00 | de Las Heras Armenteras, Claudia v Gaggini, Valentina | 6-2,6-2 |
| ITF W25 SM de Montbui | 2021/05/23 11:00 | Raquel Ducet Teixeira v de Las Heras Armenteras, Claudia | 0-6,0-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/20 14:00 | Lantigua de La Nuez, Ana v de Las Heras Armenteras, Claudia | 5-7,6-3,7-5 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/19 10:30 | de Las Heras Armenteras, Claudia v Angela Fita Boluda | 2-6,1-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/18 12:30 | de Las Heras Armenteras, Claudia v Carlota Martinez Cirez | 5-7,2-5 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/16 10:30 | Oksana Selekhmeteva v de Las Heras Armenteras, Claudia | 6-2,6-4 |
| ITF W15 Vejle | 2021/07/28 13:30 | Olivia Gram v Ani Vangelova | 4-6,6-7 |
| ITF W60 Vitoria-Gasteiz | 2021/07/15 09:00 | Lesley Pattinama Kerkhove v Olivia Gram | 6-2,6-2 |
| ITF W60 Vitoria-Gasteiz | 2021/07/13 08:20 | Klincov, Bojana v Olivia Gram | 3-6,6-2,2-6 |
| ITF W60 Vitoria-Gasteiz | 2021/07/12 11:30 | Celia Cervino Ruiz v Olivia Gram | 6-2,6-2 |
| ITF W60 Vitoria-Gasteiz | 2021/07/11 11:40 | Juarez Blanco, Angela v Olivia Gram | 3-6,0-6 |
| ITF W15 Alkmaar | 2021/06/20 09:30 | Dekmeijere, Liga v Olivia Gram | 6-0,6-3 |
| ITF - W15 Monastir | 2021/05/12 08:30 | Imanishi, Miharu v Olivia Gram | 6-1,6-0 |
| ITF - W15 Monastir | 2021/05/04 09:00 | Ayumi Koshiishi v Olivia Gram | 6-2,6-1 |