Tatyana Tomashova, a Russian athlete, has been banned from competition for a decade due to a breach of anti-doping regulations related to the 2012 Olympics. This decision results in her losing the silver medal she was awarded in the contentious women's 1,500 meters final, a race marked by widespread doping issues.

Once regarded as a world champion in 2003 and 2005, the 49-year-old Tomashova was previously sanctioned in 2008, receiving a two-year ban after manipulating drug samples. Although she returned to the sport, she faced another suspension following a positive test for anabolic steroids in 2021, with the re-examination of her out-of-competition samples collected in 2012 leading to a ruling by the Court of Arbitration for Sport.

Per the CAS's statement, Tomashova's past infractions warranted the lengthy ban, which will be effective immediately. Furthermore, all competitive results from June 21, 2012, to January 3, 2015, have been annulled, affecting her records and stripping her of various achievements.

The 2012 London women's 1,500 meters race is infamous for its high number of doping violations among competitors. After the disqualifications, many placements have shifted, affecting athletes' standings and commemorations, including moving Shannon Rowbury, who originally finished sixth, into the medal positions retroactively. Other athletes from the race, such as Abeba Aregawi, dealt similarly with anti-doping issues yet managed to retain their positions, highlighting the ongoing struggle against doping in athletics. British runner Lisa Dobriskey, who initially finished 10th, had remarked on the uneven competitive landscape, a call that seems vindicated by the ongoing fallout from the race.