Estádio: Grandstand Round: 54 Ground: Clay
| ITF - M15 Naples | 2021/10/12 13:30 | Johannes Ingildsen v Matthew Foster-Estwick | 7-5,6-3 |
| ITF - M15 Naples | 2021/10/06 18:50 | Juncheng Shang v Matthew Foster-Estwick | 6-1,6-3 |
| ITF - M15 Naples | 2021/10/05 13:30 | Matthew Beecher v Matthew Foster-Estwick | 6-7,4-6 |
| Flórida - UTR Pro Tennis Series | 2021/09/09 12:00 | Matthew Foster-Estwick v Rubin Statham | 2-6,0-6 |
| Flórida - UTR Pro Tennis Series | 2021/09/08 16:30 | Matthew Foster-Estwick v Rafael Lima Wagner | 7-5,6-6 |
| Flórida - UTR Pro Tennis Series | 2021/09/07 13:30 | Matthew Foster-Estwick v Shu Matsuoka | 4-6,6-0,6-6 |
| Flórida - UTR Pro Tennis Series | 2021/09/06 17:00 | Matthew Foster-Estwick v Michal Lusovsky | 3-6,2-6 |
| Flórida - UTR Pro Tennis Series | 2021/08/29 12:00 | Matthew Foster-Estwick v Brian Berdusco | 2-6,6-6 |
| 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 |
| ITF - M15 Naples | 2021/10/11 14:30 | Kyle Overmyer v Christian Lakoseljac | 4-6,0-6 |
| ITF - M25 Champaign | 2021/07/26 15:00 | Christian Lakoseljac v Cannon Kingsley | 2-6,2-6 |
| ITF - M15 Champaign | 2021/06/21 15:00 | Joshua Ortlip v Christian Lakoseljac | 6-3,6-4 |
| ITF - M25 Wichita | 2021/06/07 15:00 | Christian Lakoseljac v Nicholas Bybel | 5-7,5-7 |
| ITF - M15 East Lansing | 2019/11/20 22:10 | Michael Geerts v Christian Lakoseljac | 6-4,6-4 |
| ITF - M15 East Lansing | 2019/11/19 15:00 | David Fox v Christian Lakoseljac | 6-7,3-6 |