Nico Rosberg has named Mark Webber as his toughest teammate in formula one so far.
The German made his grand prix debut alongside Australian Webber at Williams in 2006, moving four seasons later to Mercedes.
While at Williams, Rosberg also raced as teammate to Alex Wurz and Kazuki Nakajima.
Rosberg's Mercedes move in 2010 coincided with seven time world champion Michael Schumacher's return to formula one at the same Brackley based team, where they have been teammates ever since.
When asked by Germany's Sport Bild who his toughest teammate has been, he answered: "Mark Webber in 2006, then Michael."
And he hopes he will be in front of his famous current teammate yet again in 2012, particularly with Mercedes hoping its new W03 is a race winner.
"To be the first German to win in the new Silver Arrow would be an absolute dream for me," said Rosberg, whose father Keke won the title in 1982.