4. Nadzeya Ostapchuk
Nadzeya Ostapchuk won gold at the 2012 Summer Olympics in London for Women’s Shot Put. However she was later disqualified from the medal for testing positive to a banned substance. She was tested twice; on the August 5th and the following day. The International Olympic Committee stated that both samples provided indicated the presence of the anabolic substance metenolone. This resulted in Valerie Adams being awarded the gold. Ostapchuk received a one-year ban after her coach Alexander Yefimov admitted to spiking her coffee with the banned substance without her knowledge.
In March 2013, Nadzeya was stripped of her 2005 World Championship gold medal after doping samples taken from the 2005 event were retested by the IAAF. The results returned were positive and consequently Ostapchuk was sanctioned to 4 years ineligibility, ending August 14th 2016.