INDIANAPOLIS -- Reigning world champion Casey Stoner is being treated for a torn ligament in his right ankle after crashing in qualifications Saturday for the Indianapolis Grand Prix.
The Australian's motorcycle wobbled as it came through one of the turns on the 2.621-mile road course. Stoner went airborne over the handlebars and slid across the track. After trying to stand up, he pointed at his injured leg and was taken away on a stretcher.
Originally, series officials thought Stoner injured his left ankle. It's unclear whether he'll race Sunday.
Spain's Dani Pedrosa later won his second Indianapolis GP pole, completing the 16-turn, 2.621-mile road course in 1 minute, 38.813 seconds.
Points leader Jorge Lorenzo, of Spain, was second in 1:38.913, and Andrea Dovizioso of Italy was third in 1:39.235.
Last year, Stoner won the Indianapolis race after claiming the pole and was the favorite to take his second straight pole at Indy on Saturday.
He had posted the fastest lap early in qualifications (1:39.465) but is fourth on the tentative starting grid with 15 minutes left in qualifying.
Also, Hector Faubel of Spain flew off his bike during qualifying for the Moto3 race. A spokeswoman for the Bankia Aspar team said the rider went to the hospital with bruised ribs and an injured back.
Hector Barbera, who broke a vertebra during a crash in Moto GP practice Friday, will head home to Spain for more tests. Toni Elias, the 2010 Indianapolis Moto2 winner, will replace him in the race on Sunday.
American Ben Spies, the 2010 Indy pole winner, also slid off his bike but was not injured.
MotoGP officials say American Nicky Hayden regained consciousness after a scary crash in which his motorcycle spun sideways, throwing him off the bike and skidding across the track.
Information from The Associated Press was used in this report.