Indianapolis (AFP) – American Alexander Rossi, a former Formula One test driver in only his sixth IndyCar race, won the 100th Indianapolis 500 on Sunday, nursing fuel over the last 36 laps for the victory.

The 24-year-old Californian spent three years as an F1 test driver before racing five times in the series last year. He switched to IndyCar this year but was never better than 10th in the series until taking his historic 200-lap triumph on the 2.5-mile (4km) Indianapolis Motor Speedway oval.