International Association of Athletics Federations biggest sponsor, Adidas, have revealed that it will terminate her contract with the Athletics body four years early.

The German sportswear giant blamed the current doping scandal that has suddenly submerged the Athletics world, which has also suspend Russia from participating in the next Olympics in Brazil.

Adidas is understood to have told the IAAF it was thinking of withdrawing from its agreement as a a result of the World Anti Doping Agency (WADA) Independent Commission's first report, published in November, which detailed claims of "state sponsored doping" within Russia.

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