Sebastian Vettel has questioned the FIA's decision to include fast corners in the new DRS zone at Silverstone.
Normally, a DRS zone is a straight line simply to improve chasing cars' overtaking chances.
However, for the British grand prix, a third DRS zone will include Silverstone's first two fast corners, Abbey and Farm.
"I'm a little confused," said Ferrari's Vettel.
"I don't know what the intention is. We are talking about something only the cars with the biggest downforce will be able to do.
"If anything, this could just be an advantage for Ferrari, Mercedes and Red Bull, and I doubt that is the intention. So I don't quite understand."
Ferrari enters the race with a 10-point lead over second-placed Mercedes.