Miller 19th overall as MotoGP season gets underway.
MotoGP World Champion Marc Marquez ended Free Practice 1 on top of the timesheets as riders took to the track for the first time in the 2015 MotoGP season.
Marquez finished with a 1m55.281s, only seven-hundredths faster than his Repsol Honda teammate Dani Pedrosa (+0.076s).
Aleix Espargaro (+0.404s) managed to end the session in third place, as he took advantage of the softer tyre option which is available to Team Suzuki Ecstar, as part of the concessions given to Factory teams without a race win since 2013.
Cal Crutchlow (+0.537s) was the top satellite rider in fifth place on the CMW LCR Honda, with Pramac Racing’s Danilo Petrucci just a further one-tenth of a second back in sixth, with the Italian also using the softer tyre option on his Ducati GP14.1.
Petrucci, who had to run back to the pits for his second bike after experiencing issues with his first, managed to finish the session ahead of the factory Ducati’s of Dovizioso (+0.699s) in eighth and Iannone (+1.034s) in 10th on the GP15 bike.
The fastest Open class rider was Stefan Bradl (+1.296s) in 14th on the Athina Forward Racing machine. Australia’s Jack Miller ended up 19th overall, his 1m56.983s lap the fourth fastest of the Open runners.
2015 MotoGP World Championship
Round one – Losail Circuit, Qatar
Thursday MotoGP practice results:
1. Marc MARQUEZ 1m55.281s
2. Dani PEDROSA 1m55.357s
3. Aleix ESPARGARO 1m55.685s
4. Jorge LORENZO 1m55.698s
5. Cal CRUTCHLOW 1m55.818s
6. Danilo PETRUCCI 1m55.939s
7. Andrea DOVIZIOSO 1m55.980s
8. Yonny HERNANDEZ 1m56.139s
9. Valentino ROSSI 1m56.162s
10. Andrea IANNONE 1m56.315s
11. Pol ESPARGARO 1m56.361s
12. Scott REDDING 1m56.374s
13. Bradley SMITH 1m56.428s
14. Stefan BRADL 1m56.577s
15. Karel ABRAHAM 1m56.651s
16. Alex DE ANGELIS 1m56.768s
17. Maverick VIÑALES 1m56.922s
18. Hector BARBERA 1m56.957s
19. Jack MILLER (AUS) 1m56.983s
20. Loris BAZ 1m57.031s
21. Nicky HAYDEN 1m57.052s
22. Alvaro BAUTISTA 1m57.130s
23. Eugene LAVERTY 1m57.224s
24. Mike DI MEGLIO 1m57.612s
25. Marco MELANDRI 1m59.579s