Honda’s Marc Marquez ended the opening MotoGP session of the Grand Prix of the Americas fastest but only just with Yamaha'’s Maverick Vinales 0.078 of a second adrift of the man to the beat in Austin.
Marquez was just under two seconds slower than his lap record around the Circuit of the Americas from 2014, setting a 2:05.311 with five minutes of the session remaining to jump to the top of the timesheets.
Pramac Racing’s Jack Miller lead the Ducati charge in third place having finished 0.027 seconds ahead of his factory counterpart, Andrea Dovizioso. The Ducati rider bouncing back from a technical problem that saw him park up his factory Ducati with around twenty minutes of the session left.
Rounding out the top five was Yamaha MotoGP’s Valentino Rossi, the Italian three quarters of a second behind Marquez. A strong start to the weekend forKTM Factory Racing and Pol Espargaro, who is just a second off of the pace in sixth place at the close of FP1.
Fastest rookie was Fabio Quartararo who jumped up the order to seventh place with his final lap of 2:06.332, only 1.012 seconds behind top spot.
LCR Honda's Cal Crutchlow ended eighth quickest before the Aprilia Racing Team Gresini duo of Aleix Espargaro and Andrea Iannone in ninth and tenth place respectively, making it five different manufacturers within the top nine places.
Full FP1 Result:
| Pos. | Rider | Bike | Time | Gap 1st/Prev. |
| 1 | Marc MARQUEZ | Honda | 2'05.311 | |
| 2 | Maverick VIÑALES | Yamaha | 2'05.389 | 0.078 / 0.078 |
| 3 | Jack MILLER | Ducati | 2'05.936 | 0.625 / 0.547 |
| 4 | Andrea DOVIZIOSO | Ducati | 2'05.963 | 0.652 / 0.027 |
| 5 | Valentino ROSSI | Yamaha | 2'06.042 | 0.731 / 0.079 |
| 6 | Pol ESPARGARO | KTM | 2'06.327 | 1.016 / 0.285 |
| 7 | Fabio QUARTARARO | Yamaha | 2'06.332 | 1.021 / 0.005 |
| 8 | Cal CRUTCHLOW | Honda | 2'06.482 | 1.171 / 0.150 |
| 9 | Aleix ESPARGARO | Aprilia | 2'06.497 | 1.186 / 0.015 |
| 10 | Andrea IANNONE | Aprilia | 2'06.692 | 1.381 / 0.195 |
| 11 | Franco MORBIDELLI | Yamaha | 2'06.729 | 1.418 / 0.037 |
| 12 | Karel ABRAHAM | Ducati | 2'06.732 | 1.421 / 0.003 |
| 13 | Danilo PETRUCCI | Ducati | 2'06.807 | 1.496 / 0.075 |
| 14 | Joan MIR | Suzuki | 2'06.863 | 1.552 / 0.056 |
| 15 | Alex RINS | Suzuki | 2'06.883 | 1.572 / 0.020 |
| 16 | Johann ZARCO | KTM | 2'06.888 | 1.577 / 0.005 |
| 17 | Takaaki NAKAGAMI | Honda | 2'06.978 | 1.667 / 0.090 |
| 18 | Jorge LORENZO | Honda | 2'07.234 | 1.923 / 0.256 |
| 19 | Francesco BAGNAIA | Ducati | 2'07.407 | 2.096 / 0.173 |
| 20 | Miguel OLIVEIRA | KTM | 2'08.035 | 2.724 / 0.628 |
| 21 | Tito RABAT | Ducati | 2'08.175 | 2.864 / 0.140 |
| 22 | Hafizh SYAHRIN | KTM | 2'09.338 | 4.027 / 1.163 |
