Conor Benn could be banned for up to four years after the UK Anti-Doping Agency vowed to launch an investigation into his failed drugs test.
Benn tested positive for a banned substance two weeks before he was due to take on Chris Eubank Jr in a grudge fight which had reignited the feud between the families. The test was carried out by the Voluntary Ant-Doping Agency which has no authority to investigate Benn but which will, according to the Daily Mail, co-operate with UKAD.
Benn could ultimately be slapped with a ban if found guilty of wrongdoing having tested positive for clomifene, a drug used in fertility treatment for women but which can also boost testosterone production in men. Benn, 26, has insisted he is innocent but has offered no explanation as to how the drug entered his system.