Nico Rosberg has announced his retirement from Formula 1 with immediate effect following his World Championship victory in Abu Dhabi last weekend. Rosberg, 31, edged out Mercedes teammate Lewis Hamilton for his maiden F1 title by five points through the 2016 season, emulating his father, Keke, who won the title in 1982. Rosberg signed a new contract with Mercedes last spring, but ahead of Friday’s FIA prizegiving in Vienna, the German announced in a press conference that he would be retiring from F1 with immediate effect. “When I won the race in Suzuka, from the moment when the destiny of...