Lewis Hamilton and Nico Rosberg's battle for the world championship will again go down to the wire in Abu Dhabi, their Mercedes team boss Toto Wolff has predicted. What had in the early rounds of the 2015 campaign looked set to be a title race firmly controlled by reigning champion Hamilton has in more recent races developed into an all-Mercedes duel reminiscent of last season with Rosberg winning three of the last four races. With Hamilton's lead now trimmed to 10 points ahead of next week's British GP, Wolff believes Rosberg's convincing win in Austria proves the dominant battle in F1 over the last 18 months remains firmly alive and will run all the way to November's Abu Dhabi finale....
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