The Australian Sports Anti-Doping Authority said in October that nine unidentified Australian athletes had tested positive for methylhexaneamine.

BBC: South Africa pair Ralepelle and Basson fail drug tests

In September, Usada announced that Florida masters racer Julio Cruz, 44, had tested positive for the banned stimulant Methylhexaneamine.

WSJ: Cycling's Minor Leagues of Doping

Both players have tested positive for methylhexaneamine, a "non-specified stimulant" on the prohibited substances list of the World Anti-Doping Agency (Wada).

BBC: South Africa pair Ralepelle and Basson fail drug tests