Formula 1: Mario Andretti gears up for US Grand Prix
BBC Sport's Tom Clarkson speaks to 1978 Formula One World Champion Mario Andretti about the upcoming US Grand Prix in Austin, Texas and the current F1 season.
Andretti won his only world title for Lotus at the Italian Grand Prix 36 years ago, and thinks the current title battle is great watching for fans.
The United States Grand Prix gets under way from 31 October - 2 November.
Available to UK users only.