( CNN ) -- Dani Pedrosa sealed pole in Sunday 's Indianapolis Grand Prix in a qualifying session marred with a number of heavy crashes . Yamaha Factory Racing 's Jorge Lorenzo took second ahead of Monster Yamaha Tech3 's Andrea Dovizioso . The first red flag of the session came after Casey Stoner suffered a suspected torn ankle ligament when he went off early in the session . Ducati 's Nicky Hayden was thrown from his bike at the same corner as Stoner later in the day . The American was briefly unconscious at the side of the track , causing another red flag while he received medical attention . Valentino Rossi will start 11th after a disappointing session . Spanish rider Hector Barbera has been replaced in tomorrow 's race by Toni Elias after it was confirmed he cracked three vertebrae in a crash during Friday 's practice session . The race takes place on Sunday , starting at 14:00 local time .
Dani Pedrosa takes pole at Sunday 's Indianapolis grand prix . Casey Stoner suffers suspected torn ankle ligaments in crash . Nicky Hayden thrown from bike , knocked unconcious . Hector Barbera suffered cracked vertebrae in crash on Friday .