Jul.17 (GMM) The big rumour in the Hockenheim paddock on Thursday is that Sebastian Vettel will shortly be announced as Mark Webber's teammate at Red Bull Racing for 2009.

The news will apparently be revealed during a press conference at the German circuit.

RBR team principal Christian Horner recently said the rumours about Vettel, 21, moving from Toro Rosso to the energy drink's senior team is a "possibility".

"We always try to have the best possible driver pairing," he added.

Vettel, who has been endorsed for the seat by the retiring David Coulthard, is already under contract to Dietrich Mateschitz's popular drinks brand.