Ferrari team principal Mattia Binotto has suggested the FIA struggle to police the Formula One budget cap effectively.

Binotto's team are competing with Red Bull for the constructors' championship this season, though driver Charles Leclerc's challenge for the drivers' crown is effectively over after a series of poor race calls.

The gap between the two could yet grow as reigning world champion Max Verstappen edges towards a second title, with Red Bull reportedly set to introduce a lighter car in forthcoming races.

There is a strong belief Red Bull will introduce a weight-trimmed chassis four kilograms lighter than their current model, which would facilitate a faster performance overall.

Binotto, though, feels the FIA are not doing enough to enforce the sport's budget cap.

"The number of people in the FIA monitoring it is very little," he told reporters. "It has to improve for the future because it would be really bad if somehow a championship was dictated by a financial regulation and not technical or sporting.

"I cannot know what they are doing, if they have a [lighter] chassis or not, but the budget cap is always a concern. The financial regulations can make differences between teams in the way they are interpreting and executing it.

"We know we need a very strong FIA to make sure they are properly focusing, otherwise the regulations will not be fair and equitable.

"Ferrari would never be capable of introducing a lightweight chassis or a different chassis through a season simply [because of the] budget cap and I would be very surprised if a team is capable of doing it.

"And if they are, it is back to the regulation itself, is it fair enough, is it equitable enough, is the policing sufficient?"

Red Bull principal Christian Horner has suggested the team are not preparing to make a change, stating: "No, there is no [lighter chassis]. These chassis will run for the next few races."