2. Round | 17/05/2021 | Rio Grande Valley FC | - | San Antonio FC | 2:1 | ||||
2. Round | 23/05/2021 | San Antonio FC | - | Birmingham Legion | 2:1 | ||||
2. Round | 30/05/2021 | San Antonio FC | - | Rio Grande Valley FC | 1:1 | ||||
3. Round | 06/06/2021 | Colorado Springs Switchbacks | - | San Antonio FC | 1:1 | ||||
3. Round | 12/06/2021 | Las Vegas Lights FC | - | San Antonio FC | 1:1 | ||||
3. Round | 17/06/2021 | New Mexico United | - | San Antonio FC | 2:0 | ||||
3. Round | 20/06/2021 | San Antonio FC | - | Rio Grande Valley FC | 1:1 | ||||
3. Round | 27/06/2021 | Real Monarchs SLC | - | San Antonio FC | 1:1 | ||||
4. Round | 04/07/2021 | San Antonio FC | - | Austin Bold | 0:1 | ||||
4. Round | 17/07/2021 | Colorado Springs Switchbacks | - | San Antonio FC | 2:3 | ||||
4. Round | 22/07/2021 | San Antonio FC | - | New Mexico United | 3:0 | ||||
4. Round | 01/08/2021 | Austin Bold | - | San Antonio FC | 0:3 | ||||
5. Round | 05/08/2021 | El Paso Locomotive | - | San Antonio FC | 2:0 |