McLaren team boss Zak Brown believes there are at least two IndyCar drivers capable of racing in Formula One at the moment.
In an interview with ESPN last year, reigning IndyCar champion Josef Newgarden expressed an interest in driving in F1, opening the discussion over why top-level IndyCar drivers are rarely in the running for seats in Formula One.
When the issue was raised with Haas' Guenther Steiner -- team principal of the only American F1 team on the grid -- he said he would be apprehensive about dropping an IndyCar driver straight into F1.