The World Endurance Championship was at its most competitive in 2016 since the rebirth of the series five years ago. Porsche took a clean sweep of all the big prizes, but rivals Toyota and Audi can look back on a season of missed opportunities.
Porsche won the drivers' title and the Le Mans 24 Hours with one of its line-ups, while the other took more wins that any one else over the course of the season.
Yet it didn't dominate: Audi had the car to win the championship and Toyota should have won Le Mans. Such close competition makes judging the performances of the drivers harder than ever.