Ferrari's Formula One head of race activities Jock Clear says the Italian team must "work hard to cover the gaps" following the departure of James Allison.
It was confirmed earlier this week that Allison would be leaving his role as technical director at Ferrari, with former engine boss Mattia Binotto taking over duties as chief technical officer. Clear believes that Allison's exit from the Marenello-based outfit will not go unnoticed.
"In the immediate aftermath, you are not going to find losing someone like James Allison, a man of his calibre, is going to go unnoticed in the team," Clear said. "The team is going to have to work hard to cover the gaps - Mattia will need help and we have to pull together."
During Thursday's drivers' press conference Sebastian Vettel said he feels confident that Ferrari is heading in the right direction despite Allison leaving, but Clear is under no illusions that moving forward without Allison's influence will present a challenge.
"There is no suggestion he [Mattia] can step into the role James was doing and cover the background, but Ferrari is committed to pulling together in the areas where James was strong. That's the challenge for all of us, and he will be missed."
Clear also revealed that the death of Allison's wife earlier this year had a big emotional effect on everyone at Ferrari.
"I've not seen Ferrari in the most enjoyable light with that hanging over us. But the team is a very motivated team, a very passionate team, and there is a will to win.
"That passion can be an Achilles heel that holds us back. But that passion is what will get us over the finishing line, will drive people. That's the biggest factor for me - that passion running through the company is fantastic."