Mike Conway cannot race for at least three months after the former GP2 driver broke his leg in a spectacular crash at the Indy 500.
The star's Dreyer and Reinbold Racing car bounced over driver Ryan Hunter-Reay's car and crashed into the fencing before disintegrating and rolling down the track upside down during the final lap of Sunday's Indianapolis 500.
Only the cockpit and front nose sections of the vehicle remained intact after the accident.
Surgery was performed on the Englishman's fractured leg on Sunday night. He has also been diagnosed with a back problem.
"Mike Conway will miss at least three months of the IZOD IndyCar Series season after having surgery on the evening of May 30 to repair fractures to his lower left leg suffered in the white flag lap crash in the Indianapolis 500 earlier in the day," an IndyCar Series statement said.
Indy Racing League Director of Medical Services Dr Michael Olinger said that Conway's lower left leg was also affected by a soft tissue injury for which he is expected to have surgery later this week.
The statement added: "Conway has a compression fracture of one of his thoracic vertebrae and is being fitted for a back brace, which he will wear for three months."
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