Schumacher's hugely-successful 21-year career

Mercedes Formula One driver Michael Schumacher of Germany sprays champagne during the podium ceremony after the European F1 Grand Prix at the Valencia street circuit in this June 24, 2012 file photo. Schumacher's departure from the Mercedes Formula One team was sealed on September 28, 2012 after the seven-times world champion recorded only one podium finish since his comeback in 2010. Schumacher, 43, the sport's most successful driver with a record 91 Grand Prix victories, will be replaced in 2013 by Lewis Hamilton, who has signed a three-year deal with the British-based team. Picture taken June 24, 2012.  REUTERS/Miguel Vidal/Files