On 1 May 1994, Brazilian Formula One driver Ayrton Senna was killed after his car crashed into a concrete barrier while he was leading the 1994 San Marino Grand Prix at the Imola Circuit in Italy. The previous day, Austrian driver Roland Ratzenberger had died when his car crashed during qualification for the race.

Senna is one of three Formula One drivers from Brazil to win the World Championship and won 41 Grands Prix and 65 pole positions, with the latter being the record until 2006. He died in an accident while leading the 1994 San Marino Grand Prix, driving for the Williams team.