Nico Rosberg urges Mercedes to 'get its act together' as rivals open the gap

The German had been one of the strongest points scorers since his team won the Chinese Grand Prix, but he failed to score any points at Silverstone after his most disappointing weekend of the campaign.

And with Red Bull Racing and Ferrari having locked out the top four places in the results, Rosberg thinks Mercedes needs to lift its game if it is not to fall too far adrift in the title chase.

"The others are really attacking now, especially the teams up front," he told his official video blog.

"We really have to get our act together to make sure that they don't get away from us in the mid-season. So I am looking forward to Hockenheim. It is a track that suits us much more, racing at home, and I am optimistic we can do a top result there."

Rosberg said he had headed in to the British GP weekend eyeing a podium finish, but things had simply not gone his way - and he ended up 15th.

"I went into the weekend really optimistic thinking if everything goes well I will be in for a podium," he said. "In the end really it was a weekend of setbacks. The weather was up and down, and generally it was a pretty crazy weekend."