Though there are maybe others, perhaps the biggest tragedy relating to deaths in motorsport racing in 2011 are the death of Indy 500 driver Dan Wheldon and the MotoGP rider Marco Simoncelli.
Daniel Clive "Dan" Wheldon (22 June 1978 – 16 October 2011) was a British racing driver from England. He was the 2005 Indy Racing League IndyCar Series champion, and winner of the Indianapolis 500 in both 2005 and 2011. Wheldon died from injuries shortly after a collision at the 2011 IZOD IndyCar World Championship at Las Vegas Motor Speedway on 16 October 2011, at the age of 33.
Marco Simoncelli (20 January 1987 – 23 October 2011) was an Italian motorcycle racer. He competed in the Road Racing World Championship for 10 years from 2002 to 2011. He started in the 125cc class before moving up to the 250cc class in 2006. He won the 250cc World Championship with Gilera in 2008. After four years in the intermediate class, he stepped up to the MotoGP class with the Honda Gresini Team. Simoncelli died after an accident during the 2011 Malaysian Grand Prix at Sepang on 23 October 2011.