Lewis Hamilton will take a five-place grid penalty in Sunday’s Bahrain Grand Prix following a gearbox change on his Mercedes late Friday in another early season setback for the world champion.

The British star had wound up fourth fastest earlier in Friday’s second free practice session at the Bahrain International Circuit.

Kimi Raikkonen was fastest as he and Ferrari team-mate Sebastian Vettel dominated the session ahead of the two Mercedes, headed by Valtteri Bottas.

Hamilton’s setback in his bid to overhaul Vettel’s early-season lead in the title race – following his victory in the season-opening Australian Grand Prix – was confirmed by the International Motoring Federation (FIA), the sport’s ruling body.

Bottas also had a new gearbox fitted on Friday evening, but escaped a grid penalty because he had already been penalised in Australia.

Four-time world champion Hamilton, who created a minor controversy when he showed his approval on social media earlier in the day of the retention of grid girls at the Monaco Grand Prix, said before his penalty had been announced that it had been “a normal Friday”.

“It’s very close and we have some work to do. The tyres feel the best they have here in years, very stable with less degradation.”

Mercedes technical director James Allison said after Friday practice that the team were not as competitive in relation to Ferrari as they had been in Melbourne.

“It wasn’t our best day,” he said. “We’ve got more to do overnight and in the practice tomorrow (Saturday) to five us a car that can fight in qualifying and on Sunday.

“The base for us is ok, but we don’t have the edge we had in Melbourne.”