A look at the history of Formula 1 title defences - the successes, the flops, and those who never returned.
Five of the worst Formula 1 title defences in the sport's history.
Can Hamilton extend Mercedes' victory streak? Can Vettel get back to winning ways? And exactly when will Maldonado crash?
Three-time Formula 1 World Champion Jack Brabham has passed away in his native Australia, a family statement has confirmed. He was 88.