Sonoma, CA (My Sportsbook) - Team Penske's Will Power and Nelson Philippe from Conquest Racing were both injured after being involved in a three-car crash during Saturday's practice session for the Indy Grand Prix of Sonoma at Infineon Raceway.

Power sustained two compression fractures in his lower back, while Philippe suffered an open fracture to his left foot. Both drivers also sustained concussions. They were transported to nearby Santa Rosa Memorial Hospital.

Philippe spun as he entered a blind and downhill portion of turn three, and then came to a stop on the left side of the racetrack. Power slammed into Philippe as he came out of the turn. E.J. Viso was also involved in the incident, but did not sustain any injuries.

Indy Racing League officials reported that Power and Philippe were awake and alert following the crash, but are expected to be hospitalized overnight. Philippe underwent surgery on his foot, and Power is scheduled to have an MRI. Both drivers' teams have withdrawn their entries for Sunday's 75-race at Sonoma.

Power, who won last month at Edmonton, was scheduled to participate in his seventh IndyCar race this season. Philippe's only start this year came in the Indianapolis 500.