The sportswear giant is IAAF’s largest sponsor and it is believed that the decision is a direct result of the doping scandal sweeping the sport.

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Neither organisation would confirm the split to the BBC, but both issued short statements referencing the “reform process” under way.

An statement from the sportswear giant says: “As you know Adidas has a clear anti-doping policy in place. Therefore, we are in close contact with the IAAF to learn more about their reform process.”