An athlete-turned-whistleblower previously coached by banned coach Alberto Salazar has called for his Nike Oregon Project (NOP) to be closed down.
Salazar was last week banned for four years, in the middle of the World Athletics Championships, following a four-year investigation by the US Anti-Doping Agency (USADA).
Athletes from his group won three gold medals at the championships in Doha. US runner Kara Goucher, who was coached by Salazar from 2004 to 2011 and provided key evidence in the case against him, told the BBC on Sunday she wants the NOP to be shut down.
"It (NOP) has to go," Goucher said.
"I feel really bad for the athletes because I'm sure many of them are innocent, but it's not my decision," she said.
"If I was Nike I'd be bringing in some new coaches and move on from this Oregon Project, because clearly it had principles not in line with clean sport and we have to just start over.
"These athletes should do the right thing -- staying in that uniform sends such a terrible message. They really need to shut it down and give athletes a chance to train under someone new and fresh."