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Maria Sharapova Announces She Failed Doping Test
Tennis player Maria Sharapova addresses the media regarding a failed drug test at the Australian Open at The LA Hotel Downtown on March 7, 2016 in Los Angeles, California. Sharapova, a five-time major champion, is currently the 7th ranked player on the WTA tour. Sharapova, withdrew from this week's BNP Paribas Open at Indian Wells due to injury. (Photo by Kevork Djansezian/Getty Images)
Kevork Djansezian—Getty Images

Mere hours after Forbes magazine bumped Maria Sharapova from the #1 spot on the list of the highest-paid female athletes, the International Tennis Federation handed down a two-year suspension after the tennis pro flunked a drug test — and Forbes predicts this could cost her upwards of $50 million in lost sponsorships and endorsements.

Forbes said Sharapova has earned $285 million over the course of her career, averaging $25 million a year, the vast majority of it coming from sponsorship and endorsement deals with companies ranging from Porsche to Evian to Tag Heuer — the latter of which dropped the tennis star after her contract expired last year. She spent 11 years as the world's highest-paid female athlete, before Serena Williams supplanted her this year.

Sharapova tested positive for meldonium, a banned substance, earlier this year at the Australian Open. On her Facebook page Wednesday, she said she would appeal the IFT's decision.

The suspension means Sharapova won't earn a paycheck from playing in a tennis tournaments for two years if her appeal is denied, but the loss of earnings she faces from sponsorships and endorsements is almost certain to be higher, with Forbes estimating the hit could be as high as $50 million.