Holden's Chaz Mostert is poised to become the latest Supercars driver to take on the IndyCar field.
The Walkinshaw Andretti United star is confirmed to compete in the next round of the American open-wheel championship's online series this Sunday.
Defending Supercars champion Scott McLaughlin has already competed in two rounds of IndyCar's iRacing Challenge, posting a win in his opening event before crashing with a lapped car earlier this week when battling for the lead with Penske teammate Will Power.
Mostert will race an Andretti Autosport car with Alexander Rossi as his teammate for round five of the challenge, to take part on a virtual Circuit of the Americas layout.