Mercedes Team Principal Ross Brawn has said that they will have to start rotating personnel if next season’s calendar remains fixed at 22 races.

The FIA’s announcement of its provisional 2014 calendar at the end of last month leaves teams facing up to what could be their longest season yet. The presence of three provisional races – Korea, New Jersey and Mexico – means it could still be trimmed back, but if that’s not the case then Mercedes click here for more