Résultats du segment 1 de l'événement FireKeepers Casino 400 2021
22 août
Michigan - Brooklyn
Michigan International Speedway 3,22 km (2,00 mi)
| P | # | Pilote | Propriétaire | Moteur | Tours | Points | PP |
| 1 | 9 | Chase Elliott | Hendrick Motorsports | Chevrolet | 60 | 10 | 1 |
| 2 | 5 | Kyle Larson | Hendrick Motorsports | Chevrolet | 60 | 9 | |
| 3 | 3 | Austin Dillon | Richard Childress Racing | Chevrolet | 60 | 8 | |
| 4 | 11 | Denny Hamlin | Joe Gibbs Racing | Toyota | 60 | 7 | |
| 5 | 24 | William Byron | Hendrick Motorsports | Chevrolet | 60 | 6 | |
| 6 | 22 | Joey Logano | Team Penske | Ford | 60 | 5 | |
| 7 | 21 | Matthew DiBenedetto | Wood Brothers Racing | Ford | 60 | 4 | |
| 8 | 1 | Kurt Busch | Chip Ganassi Racing | Chevrolet | 60 | 3 | |
| 9 | 18 | Kyle Busch | Joe Gibbs Racing | Toyota | 60 | 2 | |
| 10 | 2 | Brad Keselowski | Team Penske | Ford | 60 | 1 |