FILE - In this March 12, 2000, file photo, Ferrari's F1 driver Michael Schumacher, of Germany, is cheered by his pit crew as he heads for the finish line to win the Australian Grand Prix auto race in Melbourne, Australia. Schumacher's family, in a statement Wednesday, Jan. 2, 2019, has asked for understanding as it continues to keep details of his health private ahead of the seven-time Formula One champion's 50th birthday. Schumacher suffered serious head injuries in an accident while he was skiing with his teenage son Mick in the French Alps at Meribel on Dec. 29, 2013.(AP Photo/Rick Rycroft, File)

FILE - In this July 16, 2006 file photo, Ferrari's F1 driver Michael Schumacher, of Germany, raises the trophy after winning the French Formula One Grand Prix at the Magny-Cours circuit, central France. Schumacher's family, in a statement Wednesday, Jan. 2, 2019, has asked for understanding as it continues to keep details of his health private ahead of the seven-time Formula One champion's 50th birthday. Schumacher suffered serious head injuries in an accident while he was skiing with his teenage son Mick in the French Alps at Meribel on Dec. 29, 2013. (AP Photo/Remy de la Mauviniere, File)

FILE - In this July 25, 1997, file photo, Germany's Michael Schumacher, left, of the Ferrari team, shares a joke with Benetton chief Flavio Briatore, right, at the start of the first free practice session for the upcoming German Formula 1 Grand Prix in Hockenheim. Against the backdrop of celebrations marking Michael Schumacher’s 50th birthday Thursday, Jan. 3, 2019, the medical condition of Formula One's most successful driver remains just as fiercely guarded by his close family. (AP Photo/Thomas Kienzle, File)

FILE - In this Oct. 1, 2006 file photo, Germany's Michael Schumacher celebrating winning the Formula One Chinese Grand Prix auto race at the Shanghai International Circuit in Shanghai, China. Schumacher's family, in a statement Wednesday, Jan. 2, 2019, has asked for understanding as it continues to keep details of his health private ahead of the seven-time Formula One champion's 50th birthday. Schumacher suffered serious head injuries in an accident while he was skiing with his teenage son Mick in the French Alps at Meribel on Dec. 29, 2013. (AP Photo/Greg Baker, File)

FILE - In this Oct. 29, 1995, fie photo, German driver Michael Schumacher waves to the crowd in front of his team manager Flavio Briatore after getting off his Benetton-Renault following his victory in the Japanese Grand Prix at the Suzuka Circuit, Japan. Against the backdrop of celebrations marking Michael Schumacher’s 50th birthday Thursday, Jan. 3, 2019, the medical condition of Formula One's most successful driver remains just as fiercely guarded by his close family. (AP Photo/Naokazu Oinuma, File)

FILE - In this Oct. 27, 2012, file photo, Mercedes driver Michael Schumacher of Germany waits in his car during the third practice session for the Indian Formula One Grand Prix at the Buddh International Circuit in Noida, on the outskirts of New Delhi, India. Against the backdrop of celebrations marking Michael Schumacher’s 50th birthday Thursday, Jan. 3, 2019, the medical condition of Formula One's most successful driver remains just as fiercely guarded by his close family. (AP Photo/Saurabh Das, File)