At the end of this first day of Australian testing, the reigning World Champion dominated with a time of 1'29.497, 0.186 ahead of Valentino Rossi, and ahead of Andrea Iannone by 0.429 and Maverick Vinales by 0.492.
It would seem that the Hondas are more comfortable than at Sepang where only Marquez shone, since in Australia we find the four RC231Vs present among the first nine.
“Our day was very busy, said Mac Marquez in the evening, because we have worked a lot on the engine, which is of course different from the one we used here at Phillip Island last year. This meant we had to readjust everything during the morning and spend a lot of time in the pit.
“During the afternoon we found a foundation for electronics, but we still need to work harder in this area. I'm quick, but like Malaysia, we want to check how it works in certain areas.
“We also worked on the setup, and overall it was a positive day. The weather was good, which is always important, so I hope it stays the same for the next couple of days. »
| Pos | Pile | Team | Chrono | Difference | Laps | |
| 1 | MARCHEZ, Marc | Repsol Honda Team | 1:29.497 | 53 / 68 | ||
| 2 | Rossi, Valentine | Yamaha Motor Racing | 1:29.683 | 0.186 | 76 / 77 | |
| 3 | P | IANNON, Andrew | Team SUZUKI ECSTAR | 1:29.926 | 0.429 | 68 / 70 |
| 4 | P | VIÑALES, Maverick | Yamaha Motor Racing | 1:29.989 | 0.492 | 26 / 64 |
| 5 | P | CRUTCHLOW, Cal | Honda LCR | 1:30.065 | 0.568 | 61 / 61 |
| 6 | P | PETRUCCI, Danilo | Octo Pramac Racing | 1:30.262 | 0.765 | 87 / 87 |
| 7 | P | PEDROSA, Dani | Repsol Honda Team | 1:30.281 | 0.784 | 13 / 55 |
| 8 | DOVIZIOSO, Andrew | Ducati Team | 1:30.410 | 0.913 | 16 / 64 | |
| 9 | MILLER, Jack | Team EG 0,0 Marc VDS | 1:30.426 | 0.929 | 80 / 82 | |
| 10 | P | Folger, Jonas | Monster Yamaha Tech 3 | 1:30.578 | 1.081 | 30 / 62 |
| 11 | P | LORENZO, Jorge | Ducati Team | 1:30.631 | 1.134 | 33 / 61 |
| 12 | P | BAUTISTA, Alvaro | Pull&Bear Aspar Team | 1:30.770 | 1.273 | 24 / 68 |
| 13 | BARBERA, Hector | Royal Esponsorama Racing | 1:30.771 | 1.274 | 7 / 51 | |
| 14 | P | Espargaro, Aleix | Aprilia Racing Team Gresini | 1:30.802 | 1.305 | 26 / 28 |
| 15 | P | ZARCO, Johann | Monster Yamaha Tech 3 | 1:30.867 | 1.370 | 77 / 80 |
| 16 | ABRAHAM, Karel | Pull&Bear Aspar Team | 1:31.179 | 1.682 | 17 / 61 | |
| 17 | ESPARGARÓ, Pol | Red Bull KTM Factory Racing | 1:31.200 | 1.703 | 54 / 59 | |
| 18 | P | BAZ, Loris | Royal Esponsorama Racing | 1:31.249 | 1.752 | 56 / 60 |
| 19 | P | Rins, Alex | Team SUZUKI ECSTAR | 1:31.432 | 1.935 | 66 / 66 |
| 20 | REDDING, Scott | Octo Pramac Racing | 1:31.755 | 2.258 | 33 / 59 | |
| 21 | LOWES, Sam | Aprilia Racing Team Gresini | 1:32.307 | 2.810 | 15 / 35 | |
| 22 | P | SMITH, Bradley | Red Bull KTM Factory Racing | 1:32.690 | 3.193 | 43 / 57 |
