Mo Farah has insisted that he will not part company with coach Alberto Salazar despite doping allegations aimed at the American.
Salazar was recently accused in a BBC documentary of doping long-distance runner Galen Rupp and encouraging other athletes in his stable of breaking anti-doping violations. There are no suggestions that Farah has broken any rules.
Farah's relationship with the 56-year-old has been called into question since the allegations came to light, but the Brit has revealed that he is eager to keep working with Salazar.
"I am not leaving Alberto, I have seen no clear evidence," he told reporters on Saturday. "I spoke to him last night and asked him 'what's going on?' He told me they're just allegations and I said 'okay'.
"I am really angry at this situation. It's not fair. I haven't done anything but my name is being dragged through the mud. I need answers, to know what's going on. Are these things true?
"If Alberto has crossed the line I will be the first person to leave him. I'm a clean athlete, against drugs and anyone who isn't should be banned for life."
Farah was speaking ahead of Sunday's Birmingham Grand Prix.
