The seven-time world champion was critically injured in a horrific ski accident in the French Alps, and was put in a medically-induced coma.

Now reports have emerged stating that the bill for the 47-year-old`s care has reached £13.8 million.

That is based on the estimated £115,000 per week cost of his treatment, The Sun reports.

He is understood to have a 15-strong team of medics looking after him at his home in Geneva, Switzerland.

Schumacher was in the coma for six months after the accident on December 29, 2013, having banged his head on a rock despite wearing a helmet.

He was skiing with his son Mick when it happened.

Doctors operated to remove blood clots from his brain, but some were left because they were too deeply embedded.

His current condition is not known, with members of his inner circle stating it is a private matter.

Earlier this month, a statement from his manager, Sabine Kehm, said: `Michael`s health is not a public issue, and so we will continue to make no comment in that regard.

`We have to protect his intimate sphere. Legally seen and in the longer term, every statement related to his health would diminish the extent of his intimate sphere.`

And the statement continued: `Michael has always been very protective of his privacy, even during the most successful times of his career. He has always made sure there is a clear and distinct line between his public persona and his private one.`

But his former teammate Johnny Herbert has revealed the F1 legend has `good days and bad days`.

And friend Ross Brawn said: `The family are conducting his convalescence in private and I need to respect that.

`So I don’t want to comment on his condition beyond saying we’re extremely hopeful we’ll see Michael as we knew him at some point in the future.`

He is believed to have been worth £500 million before the accident.

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