Haas replace Ocon with Hirakawa for Mexico City GP

Haas have replaced Esteban Ocon with reserve driver Ryo Hirakawa for the rest of the Mexico City Grand Prix weekend. Ocon, who leaves the team at season's end, drove in Friday practice. Haas gave no reason but said he was not ill. The change followed a radio dispute between Ocon and race engineer Laura Mueller over tyre strategy.