Sergio Perez believes Red Bull will enter the Australian Grand Prix "a bit blind" after a "mental" day of practice at Albert Park.
FP1 was blighted by GPS problems across the grid, which left pit walls unable to provide drivers information on traffic either in front or behind - leading to a number of dangerous situations where those on flying laps met rivals on cooldowns.
The second session was then cut to just 13 minutes of dry weather running with rain hitting the circuit, with Perez unable to get a clean lap in after suffering further issues with traffic - being blocked by Lance Stroll and Zhou Guanyu.