Corinna Schumacher is not building a multi-million pound complex by the shores of Lake Geneva to care for her "hopeless case" husband, his manager has said.

Sabine Kehm dismissed reports which claimed the stricken star was to be taken to a brand new, luxury rehab centre located on the family's estate in Switerzland.

Kehm branded the claims as "groundless".

She said: "The rumours that Corinna remodels her house to bring the supposedly 'hopeless case Michael' home, are absolutely groundless."

It had been reported Schumacher would move in to the centre upon being discharged from Grenoble University Hospital, near the French Alps.

The seven-time Ferrari Formula One champion has been in a coma since hitting his head on a rock while skiing in the resort of Meribel, late last year.

Kehm's rebuttal came on same day she delivered a small message of hope for the F1 legend's fans telling reporters there were signs which give his family "encouragement" in hopes for his recovery.

She said: "I can only say again: There are signs that give us encouragement."

Corinna and Schumacher's children have maintained daily vigils at the bedside.

Staff treating the former Ferrari driver have been criticised for allegedly letting down the 46-year-old German.

Formula One's former chief doctor Gary Hartstein wrote on his blog: "I think that serious lapses in judgment were evident during Michael's initial management [which] almost certainly did worsen the outcome in Michael's case."