Ben Spies gave little indication that his shoulder pain is hampering him as he topped morning warm-up for the Indianapolis Grand Prix, though it was Casey Stoner that snatched the headlines by proving competitive despite his own injuries.

Having been diagnosed with a series of injuries as a result of his spectacular accident during qualifying, it was unclear whether the crutch-wielding Stoner would make it out for morning warm-up with a view to starting today's race.

However, the Australian, sporting a special boot to cushion the torn ligaments in his ankle, not only made it onto track for the 20 minute session, but would proceed to complete ten laps and set a time quick enough for sixth.

Just six tenths off the ultimate pace, Stoner is now expected to take his sixth place on the grid for the race in an effort to limit the damage to his 2012 title hopes.

At the head of the timesheets, two fast laps from Spies in the closing stages of warm-up would lift the American to the forefront, the former World Superbike Champion proving similarly impressive having hurt his shoulder during his own qualifying accident yesterday.

Defying the pain, Spies's laps were good enough to put him three tenths clear of pole sitter Dani Pedrosa and Yamaha team-mate Jorge Lorenzo, while Tech 3 Yamaha pair Cal Crutchlow and Andrea Dovizioso were locked together in fourth and fifth positions.

Behind Stoner, satellite Honda duo Stefan Bradl and Alvaro Bautista were seventh and eighth quickest, while Valentino Rossi's fairly nondescript weekend continued in ninth place aboard the sole remaining factory Ducati.

Of the CRT contingent, Aleix Espargaro was quickest this time in tenth position, ahead of Mattia Pasini and Randy de Puniet on the sister ART machines.