Russian tennis star has confessed that she tested positive for Mildronate/Meldonium, a medicine she has been taking for 10 years owing to health issues, and the same is included in the fresh list of banned substances.
She said she received a letter from WADA in December but didn't look at the changed list.
Take a look at the profile of the 28-year-old who told a news conference on Monday she failed a drugs test.
* April 19, 1987 in Nyagan, Russia
2. MAKING HER NAME
* Born in Siberia, moves to Black Sea coastal resort of Sochi aged two.
* Moves to Florida in 1996 to train at Nick Bollettieri's Tennis Academy in Bradenton. Sharapova's father Yuri, armed with just $700, moves to US with her. Her mother Yelena has to stay in Russia due to visa restrictions.
* Turns professional in 2001.
3. GRAND SLAM TITLES
Five: Wimbledon (2004); US Open (2006); Australian Open (2008); French Open (2012, 2014)
4. TENNIS CAREER
* Wins first tour title at Tokyo in 2003. Finishes inside top-50
* Becomes first Russian woman to win Wimbledon in 2004 aged 17, beating holder Serena Williams 6-1, 6-4 in the final.
* In August 2005 becomes first Russian woman to reach the top of the world rankings.
* Wins her second grand slam after defeating second seed Justine Henin 6-4, 6-4 in the 2006 US Open final.
* Beats Ana Ivanovic of Serbia 7-5, 6-3 in 2008 to win her third Grand Slam title, and first Australian Open.
* Regains No 1 ranking by beating Petra Kvitova in the French Open semi-finals in 2012 before defeating Sara Errani 6-3, 6-2 in the final to complete her collection of Grand Slam trophies.
* Wins a silver medal in her Olympic debut at the 2012 Games in London, losing the final against Serena Williams 6-0, 6-1.
* Wins fifth Grand Slam title at 2014 French Open.
5. OTHER NOTES
* Has shoulder surgery in 2008 followed by a nine-month injury layoff.
* Misses second half of 2013 season with a shoulder injury.
* Is the richest woman in sport and with more than 15 million fans, she is the most followed female athlete on Facebook.
6. FAILED TEST
Sharapova tells a news conference in Los Angeles that she tested positive at this year's Australian Open for meldonium, which is used to treat diabetes and low magnesium and has been banned by the World Anti-Doping Agency since Jan. 1.