F1 testing pace-setter McLaren has insisted its rear wing is within the regulations, despite questions from Red Bull about its legality.
Red Bull boss Christian Horner claimed this week that his outfit and Ferrari were unhappy about the way that McLaren was using the airbox and engine cover to help stall the rear wing of the MP4-25 - which could give the team a straight-line advantage.
"There's a bit of a fuss over McLaren's rear wing," Horner said. "They have a slot on it and they can pick up a lot of straight-line speed.
"I think it will get resolved before the first race. We've asked the FIA for clarification although I think Ferrari are probably more excited than we are to be honest."
McLaren has, however, moved to play down the matter - and says it is not only sure the design is wholly within the regulations but also has questioned whether Ferrari are as upset as Red Bull Racing.
A spokesman for the Woking-based team said: "We're very confident that our car is entirely legal - and we're not aware of any protest. In fact, we've spoken to Ferrari this morning and they're not aware of any protest either."