Follow live text and BBC Radio 5 Sports Extra commentary from first practice and sprint qualifying at the Qatar Grand Prix.

You can tell a lot about a person by what they do in the back of a Rolls Royce Phantom ($1.1m in Kangaville) in Las Vegas.

The lucrative constructors' championship is still wide open with McLaren, Ferrari and Red Bull battling for the title. The contest for teams is worth around $140 million to the winner, though the ...