IndyCar rookie Alexander Rossi has won the 100th running of the Indianapolis 500, becoming the 70th different winner of the event, after a frenetic final handful of laps which saw the lead change hands practically every lap.
After six caution periods throughout the 200-lap race it all came down to the final ten laps, where fuel management became key to achieving track position.
With five laps left Carlos Munoz led the race ahead of Josef Newgarden, however the duo required one final stop which gifted the lead to Rossi.
The former Marussia Formula 1 driver miraculously clung on to the lead of the race for the final few laps, crossing the line +4.4 seconds clear of Munoz.
Newgarden rounded out the top three ahead of Tony Kanaan, who himself led for several laps earlier on.
Charlie Kimball ended proceedings in fifth, ahead of JR Hildebrand who made minor contact with Helio Castroneves at one stage during the race.
Initial pole man James Hinchcliffe came home a distant seventh, despite leading many laps throughout the afternoon.
During the early stages of the race Hinchcliffe traded the lead with Ryan Hunter-Reay, with the Canadian racer looking competitive throughout the entire race.
Reigning champion Scott Dixon ended the race in eighth ahead of former ChampCar champion Sebastien Bourdais.
Will Power rounded out the top ten for Penske, after a miserable race which saw the Australian involved in a pit-lane incident with Kanaan and sent to the rear of the field as a penalty.
Castroneves could only manage 11th despite leading many laps in the iconic yellow Penske, after requiring a new rear-wing following the minor contact with Hildebrand.
Meanwhile championship leader Simon Pagenaud could only manage 19th, after suffering from a misfiring engine throughout the race.
The race was plagued with six caution periods, the first caused by debris on the track.
Reigning Indianapolis 500 champion Juan Pablo Montoya caused the second caution period after losing the rear of his Penske and making contact with the wall, ending a miserable month of May for the Columbian.
Sage Karam slammed into the wall shortly afterwards to cause the third caution period after running side-by-side with Townsend Bell.
Mikhail Aleshin and Conor Daly suffered separate spins at the exact same spot to cause the fourth caution period, whilst Buddy Lazier brought out the fifth after his front-left tyre fell off shortly after a pit-stop.
The sixth and final caution period came on Lap 163, after Takuma Sato made light contact with the barrier at Turn 4. The Japanese racer managed to limp back to the pits despite making contact with the wall, ending his race.
The IndyCar Series will return next weekend for the Dual in Detroit.
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