Stadium: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF M15 Tallahassee | 2021/10/28 16:00 | Ryan Shane v Christian Lakoseljac | 6-2,6-4 |
| ITF M15 Tallahassee | 2021/10/27 14:20 | Christian Lakoseljac v Dusty H. Boyer | 5-7,7-6,7-6 |
| ITF M15 Tallahassee | 2021/10/26 13:00 | Christian Lakoseljac v Carles Hernandez | 7-6,6-3 |
| ITF M15 Tallahassee | 2021/10/25 13:00 | Dhruv Sunish v Christian Lakoseljac | 6-7,3-6 |
| ITF M25 Vero Beach | 2021/10/19 16:00 | Reece Falck v Christian Lakoseljac | 6-4,6-4 |
| ITF M25 Vero Beach | 2021/10/18 16:00 | Matthew Foster-Estwick v Christian Lakoseljac | 4-6,6-7 |
| ITF M15 Naples | 2021/10/13 18:30 | Christian Lakoseljac v Blu Baker | 4-6,3-6 |
| ITF M15 Naples | 2021/10/12 13:30 | Rubin Statham v Christian Lakoseljac | 6-3,6-0 |