Schumacher begins last F1 season with questions

Michael Schumacher enters the last season of his three-year Formula One comeback with plenty of questions unanswered, while expectations for his Mercedes team remain muted after a series of disappointing results for the seven-time world champion. Schumacher's decision to come out of retirement in December 2009 was initially greeted with euphoria. The 43-year-old German joined other former champions on the F1 grid, which will feature six at the season-opening Australian Grand Prix on March 18. But his return has failed to live up to expectations. Since joining Mercedes, his best performance was fourth at the Canadian GP. Schumacher says ''victory to me is unlikely.''