English rider Daniel Hegarty dies after his motorbike crashed against the track walls on the street circuit at the Macau Grand Prix.
Nascar's Danica Patrick - the fourth-highest earning female sports star in the world - says this will be her final season as a full-time driver.
Marc Marquez claims his fourth MotoGP title in five years after finishing third at the season-ending Valencia race in his native Spain.
British Touring Car driver Luke Davenport says his first test since returning to racing felt "like putting on a pair of old slippers".
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