Fernando Alonso believes there is not point in making a plan for the race
Alonso will start from fifth on the second row of the grid in Sunday’s 500-mile race in Indianapolis.
He is hoping to follow in the footsteps of Andretti Autosport team-mate Alexander Rossi who triumphed last year as a rookie but believes he will have to be reactive over the course of the three-hour race.
“It's a race you cannot plan, so I don't have any plans or clear expectations," Alonso said.
"So far we've been quite competitive – even fighting for the first row of the grid in qualifying – so I would like to remain that competitive in the race.
Fernando Alonso at the Indy 500 Wed, May 3, 2017
Fernando Alonso has tested his McLaren Honda Andretti Indycar ahead of the Indianapolis 500
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Fernando Alonso shows off his new McLaren Honda Andretti Indycar
"The race will put you in the position you deserve, so let's see what happens.
"I cannot be frustrated at the end of the race, and I cannot be sad at the end of the race because the whole event has been a fantastic experience.
“I want to enjoy the moment.
Winning the Indy 500 would help cement Fernando Alonso's place in motor racing history
“That's the target."
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The bookies have him listed as a 13/2 joint-favourite with pole-sitter Scott Dixon but the odds have any number of runners in close proximity to the front.
Alonso will have a far better chance of winning Indy 500 than he would have done at Sunday’s Monaco Grand Prix from which he was released by McLaren-Honda.
The two-time F1 champion has managed just two finishes from five races so far this season thanks to a serious lack of power and reliability from the Honda power unit.
And having already won twice in Monte Carlo, Alonso was not enamoured by the idea of battling for an unlikely finish in the top 10 this time around.
His temporary departure has opened up the seat for Jenson Button, who appeared to have retired at the end of 2016 and admitted that he was surprised to get the call and wouldn’t have done it in his own time.
"Indy's not really been something that I've thought about," Button said.
"Personally, I was surprised that Fernando was interested in doing it but we all like different things. We're racing drivers, we're not just F1 drivers and we like trying other sports.
"For me, I'd like to do Le Mans one day.
“There are many things, but Indy hasn't been up there for me, for many different reasons."