Teenagers Paco Climent Gregori of Spain and Russia’s Philipp Aleksanyan have been banned for two years after testing positive for the anabolic steroid stanozolol, the International Tennis Federation (ITF) said on Thursday.

Climent Gregori, 16, and 18-year-old Aleksanyan, tested positive at a third-tier Futures event in Madrid on September 8, 2013.

The ITF said both players claimed the substance had been in pills given to them by an unidentified pharmacist they had befriended at the city’s Granadia Tennis Club.

But they were found guilty of an anti-doping offence and banned for two years.

The start of the ban was backdated to November 5, 2013, the date on which they were provisionally suspended and will end on November 4, 2015.