Stadium: Grand Stand Round: 26 Ground: Clay
| ATP Geneva - Herredouble | 2021/05/20 11:00 | Lammons/Withrow v Behar/Escobar | 3-6,4-6 |
| Challenger Heilbronn - Herredouble | 2021/05/15 09:00 | Goransson/Verbeek v Lammons/Withrow | 7-6,4-6,8-10 |
| Challenger Heilbronn - Herredouble | 2021/05/14 15:50 | Lammons/Withrow v Arends/Sharan | 6-3,6-3 |
| Challenger Heilbronn - Herredouble | 2021/05/13 16:30 | Kudla/McDonald v Lammons/Withrow | 6-7,2-6 |
| Challenger Roma - Herredouble | 2021/04/30 14:30 | Lammons/Withrow v Andreozzi/Duran | 3-6,4-6 |
| Challenger Roma - Herredouble | 2021/04/30 10:00 | Lammons/Withrow v Gaston/Lamasine | 4-6,6-1,10-6 |
| Challenger Roma - Herredouble | 2021/04/28 15:05 | Lammons/Withrow v Napolitano/Vanni | 7-5,6-3 |
| Challenger Roma - Herredouble | 2021/04/21 16:00 | Lorenzi/Varillas v Lammons/Withrow | 6-3,3-6,10-7 |