"Mr Martinez, a 24 year-old player from Venezuela, provided a urine sample on 14 June 2015 in association with his participation in the F17 Futures event held in Martos, Spain (the “Martos Event”). That sample was sent to the WADA-accredited laboratory in Montreal, Canada for analysis, and was found to contain cannabis..."
In other news: "The boss of the ATP said that tennis's reputation as a 'clean' sport was helping it attract blockbuster sponsorship deals."
Another big time bust: "Mr Gakhov, a 19 year-old player from Russia, was notified that he had been included in the International Registered Testing Pool under the Tennis Anti-Doping Programme (the “Programme”), and of the consequent requirement to make Whereabouts filings. He failed to comply with the requirement to make complete Whereabouts Filings..."
Gakhov has posted his test results: