Sebastian Vettel believes he is capable of a fifth Drivers' Championship with Aston Martin and he warned the likes of Lewis Hamilton and Max Verstappen. The German won four titles with Red Bull between 2010 and 2013. The German is hoping for a fresh start at Aston Martin, who unveiled their challenger this year the AMR21 on Wednesday. The 33-year-old is hoping that he can get back to the front of the Formula One grid with the Silverstone-based outfit. Vettel admitted of his toils with Ferrari: "It is not a secret that last year I wasn't at my happiest. I know it wasn't to my standards, that I was below myself, but I am very much at peace with it. I am not happy with last year in terms of performance - partly my performance - but I accepted it. I am looking forward to this year. "I think I have another world championship in me. It has been in me before and it was a big relief winning the first one and knowing you can do it. Since then, I don't see why it is not there anymore. I am not too old and I still have a long time in me. Things are different here than Ferrari because the team is growing. "It is not about the fancy looks and the fancy chairs in the office but the work done behind the scenes and from what I have seen the people are very capable and talented. It is the first time for the last few years that they are getting the oxygen to breathe [thanks to the team's increased budget]."
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