Suzuka, October 7 – (Adnkronos) -”We need to improve a lot if we want to really challenge the Red Bulls.” Jenson Button has no illusions after the best time achieved on the first day of practice for the Grand Prix of Japan. And”’only”Friday,’ says the Briton’s McLaren-Mercedes. ”The car is fine, I’m pretty satisfied. But we know that we must improve a lot: there are several areas in which we are still weak. We need to move forward in the balance”, she adds, indicating the priority ‘for qualifying tomorrow. ”We do not know what the real picture: we know that they-said-referring to the Red Bulls are very fast. But we are not slow. And then, as always, depends on how much ‘fuel tanks. Maybe Ferrari has turned to more ‘fuel than usual.” Sebastian Vettel to miss only one point to win the second consecutive world title. Button and ‘the only driver that, according to the arithmetic, can’ complicate the weekend of the Red Bull driver. ”He must retire or finish outside the top 10: It is not ‘never happened this year. We just have to think about getting the most out of our car: in this case, we can fight for the victory.”