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Magomedrasul Gasanov was removed from his scheduled fight against Abubakar Vagaev after a substance in his system raised concerns with the UFC. Fighter Ikram Aliskerov, Gasanov's sparring partner, explained that Gasanov submitted records of all compounds he had used over the past six months and tested clean, but the UFC flagged a particular substance that lingers in the bloodstream and cancelled the bout on that basis. Aliskerov compared the situation to past cases involving mildronate and expressed the view that the UFC's decision amounted to a caprice rather than evidence of deliberate doping.
AgentMMA.com

