Michael Schumacher's family feared Ralf's furious ex-wife Cora could reveal the top-secret state of his health... but even recently out ex-F1 star admits he's lost contact with stricken sibling: Inside the brothers' relationship

Bonded together through a childhood passion for karting, Schumacher would prove his younger sibling's 'mechanic and mentor', as well as the ready source for advice throughout his F1 journey.