McLaren team boss Martin Whitmarsh has hinted at the team's frustrations with the Pirelli tyres used in Formula 1, describing it as "a substantial challenge".
The comments came as the motorsport boss unveiled his team's latest updates to the MP4-27, which are set to be debuted at this weekend's German Grand Prix.
Whitmarsh is desperate for the McLaren duo of Lewis Hamilton and Jenson Button to score points having endured mixed fortunes at the last two races in Silverstone and Valencia.
The most notable updates to the car include a set of newly-designed sidepods which are likely to catch the eye of rival teams and audiences alike.
But despite the changes, the F1 boss admitted that the compounds being used in the sport remained the biggest challenge.
"Trying to understand and exploit the tyres correctly is proving quite a substantial challenge," he told Eurosport.
"So I think keeping ourselves focused, seeking to eliminate mistakes, improving the performance of the car, understanding the tyres, seeing if we can exploit them better are all top of our to do list."
The next race is scheduled to take place in Hockenheim in Germany.
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Posted by Written by Danielle Barge