Red Bull's Max Verstappen set the fastest time on the opening day of testing as main rivals Mercedes appeared to struggle, but are the world champions really in trouble? Read our recap and analysis below...
What happened?
All ten teams were present for the first of three days of testing ahead of the opening race of the season at the same circuit in two weeks' time.
A sandstorm in the afternoon made track conditions incredibly dusty and limited visibility, but the circuit remained open throughout.
Verstappen clocked the fastest time of the day, with a 1:30.