Juan Manuel Correa is set to undergo extensive surgery on his right leg on Sunday, having rejected the option of having his right foot amputated.
Correa's respiratory system is now strong enough for the American to go under the knife, four weeks on from him suffering serious injuries in the crash during Formula 2's Belgian feature race which killed Anthoine Hubert.
Correa has been treated in hospitals in Liege and London, and has been moved to a third facility in the British capital for surgery.
A statement from the Sauber junior's family read: "Juan Manuel is now fully conscious, and his lungs have recovered much faster than anticipated. His overall physical improvement and willpower has doctors impressed.
"The main objective this week has been to get Juan Manuel in the best condition possible for his surgery on Sunday that will be 10+ hours in duration.
"Sunday's surgery will be crucial in determining Juan Manuel's future. Doctors will have, for the first time since the accident, complete access to the wounds on his lower right leg.
"They will be able to determine the actual level of damage to his tibia, ankle, and foot. During surgery, they will save what can be saved and removed what needs to be removed in order to rebuild his right lower leg to the best possible condition.
"The surgeons are the top in their field and are cautiously optimistic given the fast-paced recovery that Juan Manuel has had in the previous week.
"The injuries that Juan Manuel sustained are severe, and the surgery procedure is very complex. Doctors gave Juan Manuel the option of right foot reconstructive amputation. He has chosen NOT to have the amputation and to proceed with the surgery, understanding all the challenges involved."
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