Moto3 2021 Mugello
| Pos. | # | Fahrer | Bike | Runden | Zeit | Abstand | Abstand | km/h | Topspeed | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 24 |  Tatsuki Suzuki | Honda | 4 | 1'56.001 | 162.774 | 240 | |||
| 2 | 37 |  Pedro Acosta | KTM | 5 | 1'56.597 | 0.596 | 0.596 | 161.942 | 236 | |
| 3 | 2 |  Gabriel Rodrigo | Honda | 4 | 1'56.685 | 0.684 | 0.088 | 161.820 | 243 | |
| 4 | 7 | Dennis Foggia | Honda | 4 | 1'56.980 | 0.979 | 0.295 | 161.412 | 243 | |
| 5 | 5 | Jaume Masia | KTM | 4 | 1'56.985 | 0.984 | 0.005 | 161.405 | 241 | |
| 6 | 52 | Jeremy Alcoba | Honda | 4 | 1'57.107 | 1.106 | 0.122 | 161.237 | 243 | |
| 7 | 55 | Romano Fenati | Husqvarna | 4 | 1'57.110 | 1.109 | 0.003 | 161.233 | 236 | |
| 8 | 23 | Niccolò Antonelli | KTM | 4 | 1'57.137 | 1.136 | 0.027 | 161.195 | 237 | |
| 9 | 17 |  John McPhee | Honda | 5 | 1'57.152 | 1.151 | 0.015 | 161.175 | 240 | |
| 10 | 71 | Ayumu Sasaki | KTM | 4 | 1'57.206 | 1.205 | 0.054 | 161.100 | 242 | |
| 11 | 50 |  Jason Dupasquier | KTM | 4 | 1'57.213 | 1.212 | 0.007 | 161.091 | 239 | |
| 12 | 27 | Kaito Toba | KTM | 4 | 1'57.298 | 1.297 | 0.085 | 160.974 | 241 | |
| 13 | 53 |  Deniz Öncü | KTM | 5 | 1'57.574 | 1.573 | 0.276 | 160.596 | 235 | |
| 14 | 82 | Stefano Nepa | KTM | 4 | 1'57.776 | 1.775 | 0.202 | 160.321 | 242 | |
| 15 | 11 | Sergio Garcia | GASGAS | 4 | 1'58.456 | 2.455 | 0.680 | 159.400 | 241 | |
| 16 | 40 |  Darryn Binder | Honda | 4 | 1'58.472 | 2.471 | 0.016 | 159.379 | 238 | |
| 17 | 16 | Andrea Migno | Honda | 4 | 2'01.176 | 5.175 | 2.704 | 155.822 | 235 | |
| 18 | 12 |  Filip Salac | Honda | 4 | 2'01.325 | 5.324 | 0.149 | 155.631 | 240 |
