Jessica Ennis-Hill has begun communication with the IAAF in the aim of being rewarded with World Championship gold from 2011 after champion Tatyana Chernova was exposed as a drug cheat . In January Chernova was found to have provided a positive sample for a prohibited steroid at the 2009 World Championships . The Russian anti-doping agency issued a backdated ban and annulled her records from 15 August 2009 to 14 August 2011 – just 16 days before she beat Ennis by 129 points in the heptathlon in Daegu , South Korea . Tatyana Chernova ( left ) failed a drugs test two years before beating Jessica Ennis-Hill in South Korea in 2011 . Ennis-Hill believes it is unfair that Chernova was banned but allowed to keep her world title . Ennis-Hil has written to the IAAF to ask shy Chernova has been allowed to keep her world title . Ennis-Hill , then the defending world champion , had to settle for silver . The following year the Brit took gold in memorable scenes at London 2012 , with Chernova third . Chernova 's ban is due to expire on June 21 – in time for this year ’ s World Championships in Beijing in August and , of course , the 2016 Olympics in Rio . ‘ Obviously I 'm not happy about how the ban has been handled , ’ said Ennis-Hill . ‘ I can ’ t really understand it myself . I 've spoken to British Athletics and the IAAF and I am putting my faith to look into it a bit more . ‘ I ca n't understand how that is fair . It 's so frustrating – although frustration is n't a strong enough word , because you train hard for all those years and then people do things like that . It does n't seem like she has served a ban . ‘ I think we need to be strict and if you are cheating , you 're out . I do n't think you should be allowed to come back and keep your medals . It does n't seem fair. ’ Research carried out by the University of Oslo in October 2013 established that muscles can retain the advantages given by anabolic steroids for years , even decades after the moment at which they were taken . Ennis-Hill suggested she may have suspected Chernova but could not have allowed herself to think about anything other than her competition . ‘ You might think things but you ca n't really say anything , you just get on with what you are doing and you ca n't cast aspersions until something comes out , really , ’ she said . ‘ That was a really funny competition for me because it was the year before the Olympics and I felt really ready . ‘ I just thought I could win the gold medal , and I came away with a silver . So I was disappointed . I was thinking , “ Is this how it will go into the Olympics ? ” . ‘ It gave me that extra push in a way , having that silver . But at the same time I could have been double world champion . It ’ s a weird one . But I definitely want that medal . We ’ ve had communications with the IAAF just to see how that ban works. ’ Ennis-Hill praised the work done to uncover transgressions , such as the German documentary about institutionalised doping in Russia . But admitted it left a ‘ dampener ’ on the sport . Earlier this year Russia 's athletics head coach Valentin Maslakov resigned after a number of athletes from the country were found guilty of committing doping offences . Chernova celebrates the gold medal she took ahead of Ennis-Hill a year before the London Olympic games . Ennis Hill ( right ) says the silver made her more determined to take gold at the Olympics , which she did . Ennis-Hill also criticised Nike 's choice to sponsor two-time drugs cheat Justin Gatlin . ‘ Hopefully things are being done about it and it won ’ t keep progressing on to years down the line , ’ she added . Ennis-Hill also criticised Nike ’ s decision to award two-time drugs cheat Justin Gatlin a new sponsorship deal . ‘ Again , frustrating more than anything , ’ she said . ‘ You see people cheating and they are rewarded for it down the line . I just don ’ t think it ’ s fair . At the same time you don ’ t want to get too wrapped up in it because I can ’ t control what sponsors do with athletes . But it ’ s hard to read stories like that. ’ Jessica Ennis trains in the adidas Climachill apparel range designed with advanced fabric for maximum cooling , and the adidas Ultra Boost trainers . Both available at www.adidas.co.uk .
ch ##ern - Hill second to Tatyana ##kova in 2011 final . she has since been found to have failed a test in 2009 . She has been disqualified but her 2011 world Championship title still remains .