Las Vegas Grand Prix organisers have ruled out one day following Formula One's other U.S. rounds in Austin and Miami and switching to a sprint format. The 100km race, a day before the main event, is aimed at providing more racing entertainment for fans but the Las Vegas GP is already on a Saturday and last year featured more overtaking than any other round.

Formula 1 race director Niels Wittich will be replaced in a surprise move with three races to go and the title yet to be decided. The series' governing body, the FIA, said on Tuesday that Wittich had “stepped down” and would be replaced starting from next week's Las Vegas Grand Prix by Rui Marques,

In a statement issued by the FIA, F1’s governing body said Wittich had left the role "to pursue new opportunities.”