Maria Sharapova Failed Drug Test vs Serena Williams at Australian Open 2016 Press Conference <br /> <br />Maria Sharapova announced on Monday that she failed a drug test during this year's Australian Open. <br /> <br />Related Stories <br /> <br />Tennis star Sharapova faces suspension after failing drug test Reuters <br />Things to know about Meldonium after Sharapova fails test Associated Press <br />Tennis-Reactions to Maria Sharapova's positive dope test Reuters <br />Profile of Russia's Maria Sharapova Reuters <br />Doping-Swede Aregawi faces Olympic axe after failed test Reuters <br />25 Years Later: How The Baywatch Stars Look Today Sponsored <br />The Russian-born tennis star said she received a letter from the International Tennis Federation several days ago informing her that she had failed the test for meldonium during the Australian Open in January. <br /> <br />"I did fail the test," Sharapova told reporters at a hastily arranged press conference in Los Angeles. "And I take full responsibility for it." <br /> <br />The five-time Grand Slam champion said that she had been legally taking the drug, meldonium (also known as mildronate), as prescribed by a family doctor for a decade to combat a variety of illnesses while on tour.