George Russell ensured Mercedes claimed a clean sweep of Formula 1 Las Vegas Grand Prix practice sessions with the fastest time, as a late red flag truncated the hour-long running.The Briton claimed a 1m33.570s in the final 10 minutes of the session, which went unbeaten as Lance Stroll's Aston Martin ground to a halt on the exit of Turn 12 to bring out a pause in the session.A red light remained ... Keep reading
