Great Britain's Mo Farah reportedly missed two drugs tests before winning two gold medals at the 2012 Olympics in London.
Farah has been forced to deal with speculation surrounding his coach, Alberto Salazar, in recent weeks after a BBC documentary claimed that he had helped American athlete Galen Rupp use performance-enhancing drugs in 2002.
Despite recently defending his relationship with Salazar, the 32-year-old is set to face more tough questions following a report from the Daily Mail which suggests that he missed two tests.
The report claims that the first test was missed in early 2010 before he joined Salazar's Nike Oregon Project, while the second was at his home in February 2011, when he claimed not to have heard the doorbell.
Farah, who won gold medals in the 5000m and 10000m in 2012, will return to action at the Diamond League meeting in Monaco on July 17.
