24 Hours of Le Mans
Jo Siffert / Derek Bell, John Wyer Automotive Engineering, Porsche 917 LH, leads Baron Hughes de Fierlandt / Alain de Cadenet, Ecurie Francorchamps, Ferrari 512 M, and Mark Donohue / David Hobbs, North American Racing Team (Roger Penske/Kirk F. White), Ferrari 512 M.