British motorcyclist Sam Sunderland abandoned his Dakar Rally title defence on Tuesday due to back pain, and Portuguese soccer coach Andre Villas-Boas was taken to a hospital after his car crashed against a sand dune.
Rally organisers said Sunderland, the overall leader on a KTM, withdrew near the end of the 330-kilometre special around San Juan de Marcona when he was hurt after a jump.
Australian rider and 2016 champion Toby Price finished 15th in the stage and is sixth overall, more than 10 minutes behind Adrian van Beveren in the general classification.
Van Beveren of France won the fourth stage in about four hours. He also moved into the overall lead, taking a 1:55 advantage over Pablo Quintanilla of Chile.
In the car race, the 40-year-old Villas-Boas was in 43rd position for team Toyota at the time of his accident. There was no word on whether the former Porto, Chelsea and Tottenham coach was staying in the competition.
Another Frenchman, Sebastien Loeb, won the car stage after duelling with defending champion and Peugeot teammate Stephane Peterhansel.
Loeb and Peterhansel swapped checkpoint leads. Loeb finally led through the fourth and last checkpoint while Peterhansel, whose overall lead wasn't in trouble, stopped to change a tire hanging off the rim.
Loeb beat Carlos Sainz by 95 seconds, followed by Peterhansel for a Peugeot sweep of the podium.
Peterhansel leads overall by 6:55 over Loeb.
