Wolff at your door

MERCEDES PAIR WARNED

- DANIEL MOXON

LEWIS HAMILTON and George Russell have been ordered to be at their very best for this weekend's Australian Grand Prix.

Despite optimism for Mercedes' W15 car, the start of the new Formula One season has again been underwhelming for the Silver Arrows.

And the most recent race in Saudi highlighted Arabia weakness.

a significant But team principal Toto Wolff (inset, right) and his lieutenants are at a loss as to why their machine struggles so much in high-speed corners.

More on-track running will give the team data which it can use to help identify and fix the problem.