A ninth team has added itself to the list of constructors opting to utilise one of their mandatory rookie sessions in FP1 at the Mexico City Grand Prix.

Racing Bulls confirmed on Wednesday that reserve driver Ayumu Iwasa will take Liam Lawson’s place in first practice, with Sauber the only team to not confirm a driver change at this stage – its young driver requirements have already been fulfilled, in part by fielding a rookie in Gabriel Bortoleto.

Nine teams to use mandatory rookie slot in Mexico City FP1

Formula 1 teams have seen an increase in the number of mandatory rookie sessions this season, rising from one driver swap per car to two across the campaign, with drivers who have started no more than two grands prix being eligible.

For the majority of the teams, this will be the thi

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