Just five days after winning his first Formula 1 title in Abu Dhabi, Nico Rosberg shocked the world by announcing "that's it" - he would be retiring from racing with immediate effect. The news stunned not only the F1 paddock but the world at large with front page headlines. So what's the thinking behind it? And who might step into his shoes at Mercedes?
Joe Saward gives his thoughts in today's magazine.
Plus we've also got the first part of our F1 season review as we rank our top 10 drivers and pick out other highlights. On top of that we have a full season review of the Verizon IndyCar Series plus recaps of the GP2 and GP3 campaigns.