BBC Newsnight has uncovered evidence of secret payments of millions of dollars from Azerbaijan to international boxing organisation World Series Boxing (WSB).
Whistleblowers say that WSB's chief claimed the money was in return for a guarantee that Azerbaijani fighters would win two boxing gold medals at the London 2012 Olympics.
The boxing organiser at the Olympics, AIBA, admits an Azeri national paid $9m (£5.9m) to one of their competitions.
But they deny any deal to fix medals.
Whistleblowers say that WSB's chief claimed the money was in return for a guarantee that Azerbaijani fighters would win two boxing gold medals at the London 2012 Olympics.
The boxing organiser at the Olympics, AIBA, admits an Azeri national paid $9m (£5.9m) to one of their competitions.
But they deny any deal to fix medals.
Comment