The rest of Alvaro Bautista's Qatar weekend is in doubt after the only Suzuki rider on the 2011 grid suffered a big fall with nine minutes to go.

Bautista was seen grasping his left thigh after the accident and had to be carried from the track on a stretcher.

Dani Pedrosa led most of the session, until Stoner moved in front with three minutes remaining.

This was the third and final free practice session of the extended four-night race weekend. Qualifying is on Saturday, followed by warm-up and the race on Sunday.

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1. Casey Stoner AUS Repsol Honda Team 1m 55.035s
2. Dani Pedrosa ESP Repsol Honda Team 1m 55.193s
3. Andrea Dovizioso ITA Repsol Honda Team 1m 55.740s
4. Jorge Lorenzo ESP Yamaha Factory Racing 1m 55.814s
5. Ben Spies USA Yamaha Factory Racing 1m 56.003s
6. Hector Barbera ESP Mapfre Aspar Team 1m 56.266s
7. Colin Edwards USA Monster Yamaha Tech 3 1m 56.302s
8. Valentino Rossi ITA Ducati Marlboro Team 1m 56.306s
9. Randy de Puniet FRA Pramac Racing Team 1m 56.362s
10. Loris Capirossi ITA Pramac Racing Team 1m 56.434s
11. Cal Crutchlow GBR Monster Yamaha Tech 3 1m 56.437s
12. Hiroshi Aoyama JPN San Carlo Honda Gresini 1m 56.517s
13. Marco Simoncelli ITA San Carlo Honda Gresini 1m 56.540s
14. Nicky Hayden USA Ducati Marlboro Team 1m 56.586s
15. Karel Abraham CZE Cardion AB Motoracing 1m 57.275s
16. Alvaro Bautista ESP Rizla Suzuki MotoGP 1m 57.601s
17. Toni Elias ESP LCR Honda MotoGP 1m 58.123s

Fastest Friday practice (1) lap: Casey Stoner AUS Repsol Honda 1m 55.457s

Fastest Thursday practice lap: Casey Stoner AUS Repsol Honda 1m 55.752s

Fastest 2011 Qatar test lap (Monday): Casey Stoner AUS Repsol Honda 1m 55.681s

2010 Qatar Grand Prix (11th April): Pole position: Casey Stoner AUS Ducati Marlboro 1m 55.007s Fastest race lap: Casey Stoner AUS Ducati 1m 55.537s