Stadium: Stadium Round: 27 Ground: Hardcourt indoor
| Challenger Knoxville MD | 2021/11/10 22:35 | King/Reese v Marrero/Uchiyama | 7-6,6-4 |
| US Open MD | 2021/09/05 19:05 | King/Reese v Ebden/Purcell | 4-6,4-6 |
| US Open MD | 2021/09/03 18:25 | King/Reese v Inglot/Krajicek | 7-6,6-4 |
| US Open MD | 2021/09/02 21:10 | Kubot/Melo v King/Reese | 6-7,4-6 |
| Challenger Milan MD | 2021/06/23 13:15 | King/Reese v Bonadio/Gabashvili | 6-7,6-7 |
| ATP Halle MD | 2021/06/12 16:10 | King/Reese v Masur/Molleker | 4-6,6-7 |
| Challenger Lyon MD | 2021/06/08 17:30 | Cerundolo/Nagal v King/Reese | 4-6,7-5,17-15 |
| Challenger Zagreb MD | 2021/05/15 10:25 | Golubev/Nedovyesov v King/Reese | 2-6,6-7 |
| Challenger Knoxville MD | 2021/11/09 20:35 | Harrison/Lammons v Sandgren/Torpegaard | 6-7,4-6 |
| Challenger Las Vegas MD | 2021/10/27 21:00 | Lammons/Withrow v Sandgren/Torpegaard | 7-6,7-5 |