Résultats du segment 1 de l'événement Pennzoil 400 2021
07 mars
Nevada - Las Vegas
Las Vegas Motor Speedway 2,41 km (1,50 mi)
| P | # | Pilote | Propriétaire | Moteur | Tours | Points | PP |
| 1 | 2 | Brad Keselowski | Team Penske | Ford | 80 | 10 | 1 |
| 2 | 9 | Chase Elliott | Hendrick Motorsports | Chevrolet | 80 | 9 | |
| 3 | 12 | Ryan Blaney | Team Penske | Ford | 80 | 8 | |
| 4 | 11 | Denny Hamlin | Joe Gibbs Racing | Toyota | 80 | 7 | |
| 5 | 48 | Alexander Bowman | Hendrick Motorsports | Chevrolet | 80 | 6 | |
| 6 | 20 | Christopher David Bell | Joe Gibbs Racing | Toyota | 80 | 5 | |
| 7 | 24 | William Byron | Hendrick Motorsports | Chevrolet | 80 | 4 | |
| 8 | 21 | Matthew DiBenedetto | Wood Brothers Racing | Ford | 80 | 3 | |
| 9 | 22 | Joey Logano | Team Penske | Ford | 80 | 2 | |
| 10 | 19 | Martin Truex Jr. | Joe Gibbs Racing | Toyota | 80 | 1 |