Estonian Markko Martin will have more hospital tests following his crash in the Rally of Argentina on Friday. Martin was flown to hospital in Cosquin by air ambulance after the accident and was then transferred to Cordoba for a X-rays on his head, neck and chest.
The Ford driver was discharged on Friday evening but is returning after complaining of blurred vision.
His British co-driver Michael Park was given the all-clear after the crash, which happened on the fifth stage.
"We took a slightly different line and on landing, the car's differential guard hit a rock," said Park.
"The impact kicked the car into the air and we landed on its nose before rolling end over end down the road."