Her best results in the Junior Grand Slam tournaments were the finals of the 2002 Australian Open, finals of the 2002 Wimbledon Championships, third round of the 2002 French Open, and second round of the 2001 US Open.
From 2003, Sharapova played a full season and made a rapid climb into the top 50 by the end of the year.
She won the year-ending WTA Finals in her debut in 2004. Despite an injury-prone career, Sharapova has achieved a rare level of longevity in the women's game.
She won at least one singles title a year from 2003 until 2015, a streak only bested by Steffi Graf, Martina Navratilova, and Chris Evert.
At the latter event, she defeated a player ranked in the top 10 for the first time with a straight-sets win over world No. Later that clay-court season, she went on to make the quarterfinals of a Grand Slam for the first time at the French Open, losing there to Paola Suárez.
her first win over a top-20 player, to reach the fourth round, where she lost in three sets to Svetlana Kuznetsova.
By the end of September, Sharapova had already captured her first WTA title at a smaller event, the Japan Open Tennis Championships, before winning her second in her final tournament of the season, the Bell Challenge.
She had tested positive for meldonium, a substance that had been banned, effective January 1, 2016 by the World Anti-Doping Agency (WADA).
On June 8, 2016, she was suspended from playing tennis for two years by the International Tennis Federation (ITF).