Feb.23 (GMM) F1 is reportedly working to convince its official tyre supplier Bridgestone to stay in formula one beyond this year.

The Japanese supplier, constantly involved in F1 since 1997 and the official sole supplier between 2008-2010, has announced it will withdraw from the sport at the end of this season.

Korean suppliers Kumho or Hankook were reportedly interested in taking over in 2011, but a new report in Spain's El Mundo Deportivo said the pair are in fact not serious alternatives.

The report said the teams are "very concerned" about the tyre situation for 2011, and that talks about reducing Bridgestone's necessary expenditure are taking place.

El Mundo said Bridgestone's current annual spend is EUR55 million.

The rules for 2010 have already been amended so that 11 sets of tyres rather than 14 are available to each driver per event.

A Michelin spokesman said recently the French marque "might consider" returning to F1 if the rules are further amended to demonstrate the tyres' role in "fuel saving and C02 reductions".

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