Jorge Lorenzo's fears weren't quite realised but the threat of rain remains as darkened skies engulfed the Aragon circuit for warm-up that precedes Sunday's MotoGP race.

In the last chance to alter bike set-up and a session in which Valentino Rossi stated he needed to find half a second in race pace, Marc Marquez led Jorge Lorenzo by 0.2s after setting a time of 1m 48.181s.

The time was on the eleventh and final lap in Marquez's session, showing he and his RC213V are prepared come hot or cool race conditions.

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Behind, Lorenzo was able to lap in the mid 1m 48s, although his pace wasn't quite on a par with his countryman, suggesting Marquez may have one or two tenths a lap in hand in the race.

Pol Espargaro backed up his best qualifying performance since Jerez with the third fastest warm-up time. The 2013 Moto2 world champion's consistency was called into question by Bradley Smith on Saturday but Espargaro showed definite speed, circulating with Rossi when he set his fastest time.

Next up came the current championship leader, whose pace was distinctly below that of the front two men. Indeed Rossi changed bikes at the close of the session but switched to the same set of tyres, suggesting he was testing different set-ups until the last available moment.

So strong in Saturday's afternoon heat, Dani Pedrosa was fifth. Consistent? Yes. As fast as he was a day ago? Certainly not. The Spaniard's race pace will nonetheless pose Rossi several problems but the success of his race will hinge on a strong opening lap.

Riders used the early part of the session to enter pit lane and practice a bike swap in the case of a flag-to-flag race. There was a potential spark between the Movistar Yamahas as Lorenzo executed a perfect bike change after his first out lap.

As he went to exit on his second bike, Rossi pulled alongside, halting Lorenzo in his tracks. A frustrated shaking of the head conveyed the Spaniard's frustrations.

Smith was sixth while Andrea Dovizioso appeared to have found something regarding set up as he climbed to seventh overall.

Warm-up:
1. Marc Marquez
2. Jorge Lorenzo
3. Pol Espargaro
4. Valentino Rossi
5. Dani Pedrosa
6. Bradley Smith
7. Andrea Dovizioso
8. Cal Crutchlow
9. Maverick Vi?ales
10. Andrea Iannone
11. Yonny Hernandez
12. Danilo Petrucci
13. Aleix Espargaro
14. Scott Redding
15. Nicky Hayden
16. Jack Miller
17. Mike Di Meglio
18. Alvaro Bautista
19. Stefan Bradl
20. Alex De Angelis
21. Eugene Laverty
22. Hector Barbera
23. Loris Baz
24. Toni Elias
25. Karel Abraham