IAAF president Sebastian Coe has moved to deny claims he lobbied for the 2021 World Championships to be given to the city of Eugene.
The city in Oregon, United States was given the event without a bidding process, although Gothenburg had expressed an interest.
Eugene is closely associated with sports manufacturer Nike, for whom Coe is an ambassador, with the company's headquarters situated in Beaverton, approximately 100 miles north of Eugene.
An investigation from the BBC claims Coe - then in his role as IAAF vice-president - "reached out" to predecessor Lamine Diack in his support of the bid from Eugene.
Amid allegations of a conflict of interest, the IAAF subsequently published a question and answer session with Coe on its website, in which the president denied the claims.
"No, I did not lobby anyone on behalf of the Eugene 2021 bid," Coe said.
"After their [Eugene's] narrow defeat for the 2019 World Championships I encouraged them to re-enter another bidding cycle as they had a strong bid.
"My views on all the bids for the 2019 IAAF World Championships (including Eugene) are a matter of record as I was Chair of the Evaluation Commission for those bids.
"All my interests were, and continue to be, fully declared to the IAAF Ethics Committee and listed at the House of Lords."