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Mercedes have promised they are 'not bluffing' despite scepticism about their Formula One testing issues among rivals. Christian Horner and Carlos Sainz believe they can see through claims made by Lewis Hamilton and George Russell ahead of the start of the 2022 season.

Hamilton claimed Mercedes are struggling to perform under new regulations and will not compete for wins at the beginning of the campaign.

Hamilton and Russell both had issues with their cars bouncing during testing in Bahrain.

"It is too early to have those kind of thoughts about the world championship, but at the moment I don't think we will be competing for wins," Hamilton said.

He added: "We have some hurdles to overcome and obviously next week we'll get a much better showing of our pace, but I think people will be surprised, because people keep