Mark Webber's retirement from professional motorsport at the end of 2016 will mark more than the end of a career that netted nine Formula 1 grands prix victories and the '15 World Endurance championship. It also opens up a space in one of the most exciting manufacturer seats in motorsport.
Porsche has made a predictably impressive impact on Le Mans and the WEC since it returned to top-level sportscar racing in 2014. Not only has the 919 Hybrid twice won the Le Mans 24 Hours, it is well on its way to a second drivers' and manufacturers' double crown.
The space alongside Webber's fellow 2015 world champions Timo Bernhard and Brendon Hartley is therefore a coveted one. So who should Porsche choose?