30 December 2013 Last updated at 19:55 GMT

Michael Schumacher is a fighter - Murray Walker

Formula 1 commentary legend Murray Walker is hopeful that Michael Schumacher's fitness and mental resilience will aid him to recover from a skiing accident.

Seven-time Formula 1 champion Schumacher remains in a critical condition after the accident and doctors say he is "fighting for his life".

Walker says that the fact Schumacher has fought back from a motorcycle injury means he is a fighter and hopes he can recover from this "major tragedy".