Jenson Button has voiced cautious optimism after an opening day of practice that saw McLaren feature fairly prominently - by the standards of their poor season - on the timesheets in Abu Dhabi.Button was seventh fastest right behind team-mate Sergio Perez, which equates to McLaren's best performance on a Friday in 2013. They are still searching for a podium finish but did at least end the session closer to pacesetter Sebastian Vettel - within 0.7 seconds - after McLaren tried a low-downforce set-up on their MP4-28 cars. That meant they were fastest through the speedtraps, with Button saying the reason for them trying skinnier wings is for fear of losing out to rivals on the Yas Marina...
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