CLICK HERE to view the Free Practice 2 results for the 2014 Austin MotoGP round held at the Circuit of the Americas, Texas.

Marc Marquez switched to the hard rear tyre during second Friday practice for the Austin MotoGP - and pulled even further away from the field.

Quickest by 0.9s during a dominant morning performance with the medium rear, the reigning world champion picked up where he left off in the afternoon.

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The Repsol Honda rider beat his morning best set within fifteen of the 45 minutes, just as the cameras cut to struggling rival Jorge Lorenzo in an animated discussion with crew chief Ramon Forcada.

Still on the hard rear, Marquez then improved by a further 0.335s at the midway stage, putting the inaugural 2013 event winner 1.4s clear of nearest rival Stefan Bradl, before finishing the day with an advantage of 1.005s over Ducati's Andrea Dovizioso.

But Dovizioso's late lap was set on the special soft rear tyre only available to Ducati and the Open class, meaning Marquez's like-for-like lead was 1.133s over team-mate Dani Pedrosa (also on the hard rear this afternoon).

Pramac Ducati's Andrea Iannone also exploited the soft rubber for fourth place, with Valentino Rossi again the top Yamaha but dropping from fourth to fifth position (+1.303s).

Just twelfth fastest this morning, team-mate Lorenzo finally looked to be making progress during the afternoon session, reaching third on the medium compound rear tyre.

However the double world champion was pushed back to eighth by the conclusion of the session, albeit only 0.1s slower than Rossi. Bridgestone has made a one-off switch back to the 2013 medium rear for this weekend, favoured by Lorenzo, making his continued difficulties something of a surprise.

Between the two Movistar Yamahas were Aleix Espargaro and Bradl. Forward Yamaha's Open class star Espargaro had been second this morning on the soft rubber. LCR Honda's Bradl also peaked with second position, but on the hard rear.

Dovizioso's team-mate Cal Crutchlow and Tech 3 Yamaha's Bradley Smith completed the top ten.

Alvaro Bautista (Gresini Honda), Pol Espargaro (Tech 3 Yamaha) and Scott Redding (Gresini Honda) followed, rookie Redding being the fastest of the Open class RCV1000R riders.

Home American stars Nicky Hayden (Aspar Honda) and Colin Edwards (Forward Yamaha) were 14th and 16th respectively.

Free Practice 2:
1. Marc Marquez
2. Andrea Dovizioso
3. Dani Pedrosa
4. Andrea Iannone
5. Valentino Rossi
6. Aleix Espargaro
7. Stefan Bradl
8. Jorge Lorenzo
9. Cal Crutchlow
10. Bradley Smith
11. Alvaro Bautista
12. Pol Espargaro
13. Scott Redding
14. Nicky Hayden
15. Yonny Hernandez
16. Colin Edwards
17. Hiroshi Aoyama
18. Karel Abraham
19. Hector Barbera
20. Danilo Petrucci
21. Michael Laverty
22. Broc Parkes
23. Mike Di Meglio