Mercedes team boss Toto Wolff added that Red Bull seemed too quick and that Mercedes is working hard to improve the car compared to last year.
So far, the performances of Red Bull, Mercedes and Ferrari seem to be close to each other, while the three teams are looking at the new challenge.
While many names favor Mercedes, the number of people who think that Ferrari and Red Bull are in the fight are not too few.
Mercedes team boss Toto Wolff underlines Red Bull's performance, and Ferrari and Mercedes think the Austrian team will be close.
Wolff, "I think the difference is a maximum of 0.1 seconds, but you do not know the fuel load of your competitors in the tests, but Red Bull is very influential."
"Ferrari always needs to be accounted for, and it looks like a good car again."
"We have two different situations, either the best or the worst, and if it is in its best condition, we will not be far ahead, and in the worst case we will not be far behind."
"As I said, Red Bull has a very powerful vehicle, races and championship will be in. We will fight for it all, it will be a tough battle and it excites me very much." said.
Wolff said that W09 is no longer "diva".
"We worked really hard to improve our new vehicle, and in W09 we tried to fix the mistakes we found on 2017, and we seem to have done it."
"Suspension and many parts are new, we hope to get away with the problems we experienced 12 months ago. said.
Wolff talked about Hamilton's new contract: "We are talking in detail, and if Lewis stays with us until 2020, we will compete for eight seasons, I think the deal can be concluded before Melbourne." said.
Bottas, on the other hand, claims that Mercedes is a leader with a big difference: "We're not in front of anyone for a second." he denied it.