Herta's F1 move delayed by error at Mexico City

American driver Colton Herta's wait for the superlicence he needs to race for Cadillac in Formula 1 next season will continue another week after a bizarre misunderstanding involving the team, the governing FIA and IndyCar's official website.

Herta and Cadillac arrived at the Mexico City Grand Prix believing he had 39 of the 40 superlicence points required under the regulations for any driver wanting to race in Formula 1, meaning his appearance in Friday's opening practice session would get him over the line.