Stadium: Court 3 Round: 26 Ground: Hardcourt indoor
| 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 D / Krajicek A | 7-6,6-4 |
| US Open MD | 2021/09/02 21:10 | Kubot L / Melo M 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 D / Molleker R | 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 A / Nedovyesov A v King/Reese | 2-6,6-7 |
| Challenger Zagreb MD | 2021/05/14 13:15 | King/Reese v Arneodo/Olivetti | 7-6,3-6,10-5 |
| Challenger Las Vegas MD | 2021/10/27 19:25 | Kozlov S / Polansky P v Galloway R / Lawson A | 4-6,6-7 |
| Challenger Columbus MD | 2021/09/25 20:25 | Kozlov S / Polansky P v Lutschaunig/Trotter | 7-5,7-6 |
| Challenger Columbus MD | 2021/09/24 22:25 | Galloway R / Lawson A v Kozlov S / Polansky P | 5-7,6-3,2-10 |
| Challenger Columbus MD | 2021/09/23 20:45 | Nam/Song v Kozlov S / Polansky P | 3-6,7-6,6-10 |
| Challenger Columbus MD | 2021/09/22 00:30 | Brouwer/Stalder v Kozlov S / Polansky P | 5-7,6-4,7-10 |
| Challenger Cary MD | 2021/09/18 19:45 | Blumberg/Schnur v Kozlov S / Polansky P | 6-4,1-6,10-4 |
| Challenger Cary MD | 2021/09/17 22:35 | Kozlov S / Polansky P v Jung J / Krueger M | 6-7,7-5,10-4 |
| Challenger Cary MD | 2021/09/16 18:30 | Aragone/Barrientos v Kozlov S / Polansky P | 4-6,4-6 |