Robert Kubica cut a very frustrated figure after being pulled out of the Russian Grand Prix by Williams.

The British team took the decision following an unspecified failure on George Russell's car saw him unable to turn and skid straight in the barrier.

Not only that, but Kubica also confirmed his retirement has been ordered to "conserve parts for the rest of the season".

“I think it is the worst weekend of my career,” the Pole continued telling Ziggo Sport.

“Not from a driving point of view, but I think for many reasons this weekend has been very disappointing.”

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While being unwilling to go into specifics, Kubica did suggest that Williams were treating him differently.

“Different reasons. I can only talk about what I feel, what I know," he said.

“After four laps of FP1, I report massive issues that the car characteristics are very strange, it was nearly undrivable.

“If we keep the same things on the car then the margin will not go overnight.

“I don’t need special help. I just need a tool which is working and I think then I can drive well," he added.

“It is painful sometimes but I always try to do the best with what I have. I had a secret goal to finish all races and unfortunately, I will not achieve this.”

Indeed having gone the first 14 races without a retirement, Williams has now had three in the space of a week.