 Complete the following phrase:  After winning the 2006 Italian Grand Prix, Michael Schumacher announced his retirement from Formula 1 racing at the end of the 2006 season. Kimi Räikkönen replaced him at Ferrari from the start of the 2007 season. At the 2008 Italian Grand Prix, Sebastian Vettel became the youngest driver in history to win a Formula One Grand Prix. Aged 21 years and 74 days, Vettel broke the record set by Ferdo Alonso at the 