Fernando Alonso has admitted his surprise at how lucrative taking part in the Indy 500 is.
The Spaniard qualified fifth, was crowned rookie of the year and retired with a blown Honda engine as he skipped Monaco to take part in the fabled US oval race.
It emerged that he took home about $300,000 in prize money.
"I’m going to have to tell the guys in formula one," the McLaren-Honda driver is quoted by the German broadcaster RTL.
"It’s a really good thing you have here, and I think a lot of F1 drivers will be coming soon."