Asked by AUTOSPORT for his feelings on the car being in the fight at the front in Australia, Horner replied: "We've never believed that we won't be and we will keep fighting as hard as we can to fight ourselves back into competitiveness.
"We know we have got the basis of a good car.
"We know we have got issues to sort out, we just have to work hard to get on top of them quickly, together with the guys from Renault. We are doing our best to support them.
"[Melbourne] was the best opportunity that we have really had to work on the car with set-up and the first opportunity to drive the car properly."
Although Red Bull won four straight F1 titles prior to 2014, Horner said there were enough blips and challenges in those seasons for the team to prove it could cope with adversity.
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