Stadium: Court 12 Round: 26 Ground: Hardcourt indoor
| Challenger Zagreb MD | 2021/05/15 10:25 | Golubev/Nedovyesov 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 Zagreb MD | 2021/05/14 11:15 | Jebavy/Martin v King/Reese | 6-2,3-6,4-10 |
| Challenger Zagreb MD | 2021/05/12 08:00 | Babic/Fallert v King/Reese | 7-6,4-6,8-10 |
| Challenger Prague MD | 2021/05/06 10:45 | King/Reese v Sabanov/Sabanov | 6-7,5-7 |
| Challenger Prague MD | 2021/05/05 13:30 | Lehecka/Vrbensky v King/Reese | 4-6,1-6 |
| Challenger Ostrava MD | 2021/04/30 13:05 | King/Reese v Paulson/Rikl | 4-6,4-6 |
| Challenger Ostrava MD | 2021/04/29 13:00 | Balaji/Nedunchezhiyan v King/Reese | 2-6,6-2,6-10 |