Drivers have spoken out about the challenges to the Singapore GP, dubbing it one of the hardest on the circuit.

Ahead of Sunday's race Fernando Alonso commented: "The walls will be the limitation here, and it's probably the most demanding race, physically, of the championships. So keep the level of focus very high throughout the race."

While George Russell commented: "It's the top two, here and Qatar are by far the most physical races. I think here it's challenging because there are so many corners, pretty relentless.

"Slightly easier now that we've got that straight at the back versus what it was like a few years ago. But just with the humidity or dripping in sweat as soon as you go outside, let alone when you're locked in a race car for two hours."