"There's a big gap to close from Mercedes and Ferrari". Their vehicle looked really nice to drive at testing.
Horner was particularly impressed with Mercedes' pace in the afternoon session.
"Overall, I think we have a pretty good package, but we won't know where we are until we get into the race weekend and see if we have closed the gap to Mercedes and Ferrari".
Red Bull team boss Christian Horner was left impressed by Mercedes' opening salvo in free practice in Melbourne while he felt that Ferrari had "under-delivered" in the Friday sessions. "We have work to do".
Based on previous years, it is expected that Ferrari will also introduce new parts to the auto this weekend. "We'll have a much better understanding of it - but I think it's the same for everyone".
"On the long runs we look pretty sensible and I think the one lap pace of the Mercedes in that session looked pretty impressive, but the vehicle looks stiff and hard to drive so whether that's sustainable for a grand prix I don't know".
"Naturally after a test, you always improve the next day as the vehicle gets older and older throughout the test". It wears and then you go away, you analyse where you've been. So, everyone takes a step after testing.