Michael Schumacher's condition remains stable but critical, eight days after the German suffered brain injuries in a skiing accident in France.

"The clinical state of Michael Schumacher is stable as he's under permanent care and treatment," Grenoble hospital said in a statement yesterday.

"However, the medical team in charge stresses that it continues to assess his situation as critical."

The retired seven-times Formula One world champion hit his head on a rock while skiing off-piste on December 27.

Schumacher has been in an induced coma since then and has undergone two operations.

The medical team and the German's management repeated their call to respect his privacy and said they would not send any more statements or hold any news conferences until further notice.

Last week, his agent Sabine Kehm urged journalists to stay away from Mr Schumacher after security guards said they intercepted a reporter disguised as a priest who was trying to get into his room.

"The patient's privacy requires that we do not disclose any details about his treatment and that's why we do not plan any news conference nor written statements for now," said the medical team and Mr Schumacher's management.

"We ask you again, insistently, to ... stick to the information provided by the medical team in charge or his management because they are the only valid ones."