Rosenqvist missed two races in connection with the recovery after the crash where he had concussion-like symptoms, where, however, nothing was broken.

He has reviewed the protocol that Indycar has after crashes.

- You only have one brain, Rosenqvist says to AP from Lexington, Ohio.

During the night's training, Rosenqvist was fast but span and got to see the red flag from his Arrow McLaren.

- It was quite slippery out there but the car felt quite fast, says the Swede who had the 13th fastest time and feels that it is normal.

- Or at least 99 percent, he says to Indycar's website.

There will be another training during the day and on Sunday at 18.00 Swedish time the race will be run.

The next race runs August 8 in Nashville.