McLaren racing director Eric Boullier has called on the team "to dig deep" for the remainder of the 2014 season.

It's been a tough year so far for McLaren, with the season-opening Australian Grand Prix the only time it has had a driver on the podium. However, recent races have seen the team fighting more with the likes of Red Bull and Ferrari, and Boullier says he wants the intensity to remain the same in order to take momentum in to 2015.

"The start of the fly-aways marks the final chapter of the world championship season," Boullier said. "It's a time when the whole team needs to dig deep as we continue our work to improve the car and carry some positive momentum across the winter and into next year. It's an important time for everyone - and it will be interesting to see how our car responds to the return to the high-downforce circuits that proliferate for the remainder of the year."

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One major change in Singapore this weekend is the ban on certain team radio messages, and Boullier said it was an area McLaren was having to focus ahead of the race.

"We are still evaluating the full consequences of the new interpretation of Article 20.1 of the FIA Sporting Regulations, but, as a team, we will of course find a solution that works and which follows this new interpretation. Singapore is a difficult race to manage under normal circumstances, so this will definitely add an extra dimension to our preparations."