The 2012 season saw several driver changes. Lotus chose not to take up an option on Vitaly Petrov's contract, and did not offer Bruno Senna a new contract. Petrov and Senna were replaced by World Drivers' Champion Kimi Räikkönen – returning to the sport after two seasons competing in the World Rally Championship – and reigning GP2 Series champion Romain Grosjean, who also returned to the sport after a two-year absence. Petrov later replaced Jarno Trulli at Caterham; Trulli's replacement meant that the opening race of the season would be the first race since the 1973 German Grand Prix to take place without an Italian driver on the grid. Senna joined Williams, the team having previously attempted to secure Räikkönen for the season. Senna replaced Rubens Barrichello, who left Formula One after a record-breaking nineteen seasons. He later moved to IndyCar for the 2012 season, joining KV Racing Technology.