Michael Schumacher has undergone a second operation overnight following a skiing accident in the French alps, according to media in the country.
French newspaper Le Dauphiné Libéré reported that Schumacher had undergone the second operation overnight at the Grenoble University Hospital Centre. An update on the condition of the Formula One legend will be made at 10am on Monday.
It was also reported Professor Gerard Saillant, who co-ordinated the driver's medical care after he broke his leg in the 1999 British Grand Prix at Silverstone, is present at the hospital.
The former racing driver's spokeswoman Sabine Kehm said in a statement: "Michael fell on his head when he was on a private skiing trip in the French Alps.
"He was taken to hospital and is receiving professional medical attention.
"We ask for understanding that we cannot give out continuous information about his health. He was wearing a helmet and was not alone. No-one else was involved in the fall."
The director of the Meribel resort was earlier quoted as saying the injury, which happened at 11.07am local time, was "not very serious".
Christophe Gernignon-Lecomte said on rmcsport.bfmtv.com: "It was a pretty heavy fall at 1100 this morning while skiing off piste. He was wearing a helmet. He was conscious after his fall.
"Two or three minutes later two ski patrol intervened to help him. They immediately asked for a medical evacuation helicopter. It arrived in less than 15 minutes. He was sent to Moutiers first, then on to Grenoble for more analysis."
Actress Natasha Richardson died in 2009 after suffering a serious head injury in a fall at a Canadian resort. Initially she had not seemed to be seriously injured following the accident during a skiing lesson at the luxury Mont Tremblant resort in Quebec.
Come on Michael, give us one of those race stints at pure qualifying pace to win through, like you used to. You can do it.— Martin Brundle (@MBrundleF1) December 29, 2013
My thoughts are with Michael Schumacher at this tough time.. Michael more than anyone has the strength to pull through this.— Jenson Button (@JensonButton) December 29, 2013