Paris: Seven-time Formula One world champion Michael Schumacher is in a hospital in Paris for cell therapy surgery, according to reports.
Schumacher was reportedly admitted to Georges-Pompidou hospital on Monday afternoon.
The retired driver suffered a serious head injury in a skiing accident in France in December 2013.
Schumacher had been skiing with his son in the French Alpine resort of Meribel when he fell and hit his head on a rock.
He had been wearing a helmet at the time, but he arrived at Grenoble University Hospital Centre already in a coma and immediately underwent brain surgery.
Schumacher, the most successful driver in Formula One history, has been seriously hurt before.
He broke his leg in a crash at Silverstone race course in 1999 and suffered serious neck and spine injuries after a motorcycling accident in February 2009 in Spain.