Force India’s deputy team principal Bob Fernley is worried that fourth will be more difficult to obtain next season as McLaren and Renault enter the mix.

Last time out in Mexico, Sergio Perez and Esteban Ocon wrapped up fourth place in the Constructors’ Championship as they brought Force India’s tally up to 175.

With a maximum of 50 still in play, that means Williams in fifth with 76 points cannot catch them.

Next season, Fernley admits P4 will be harder to come by as the likes of McLaren, who are swapping to Renault power, and Renault’s works team enter the fray.