BBC Sport - Formula 1: Jenson Button seeks McLaren improvement

Button seeks McLaren improvement

McLaren's Jenson Button believes that despite being quickest in practice in Japan, there are areas of the car's performance that "need improvement" if they are to challenge the race pace of Red Bull.

The 31-year-old Briton is second in the driver standings and is the only person who can prevent Sebastian Vettel from becoming the youngest back-to-back world champion, although the German needs only one point from the season's remaining five races to win the title.

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