Audi R18 E-Tron Quattro Hybrid N°3 driver Brazil's Lucas Di Grassi (L) speaks with his teammate Spanish Marc Gene in the pit after Lucas Di Grassi clocked the second best laps time in 3' 25 358 during the test day of the 90th edition of Le Mans 24 hours endurance race, on June 9, 2013 in Le Mans, western France. Fifty-six cars with 168 drivers will participate on June 22 and 23 in the Le Mans 24-hours endurance race. AFP PHOTO / JEAN-FRANCOIS MONIER

Le Mans, France - Marc Gene will replace Loic Duval in the Audi No. 1 car at this weekend's 24 Hours of Le Mans after doctors ruled the defending champion should not compete following a spectacular crash during Wednesday's practice.

Duval's car was destroyed in the crash.

Audi Sport tweeted that the driver was “unhurt apart from two grazes to the skin,” but race organizers said later on Thursday that doctors “submitted a report to the marshals disallowing him from racing”.

Gene won the 24 Hours of Le Mans with Peugeot in 2009. He will team up this year at Audi with Lucas di Grassi and Tom Kristensen, the most successful driver in the race's history with nine victories.