The 27-year-old tested positive for banned substance fenoterol, used for asthma, on August 9, the day after she earned the gold medal in the women’s under-57 kilograms category at last year's Pan American Games in Lima.  

She has since been stripped of this medal and given a two-year ban.

In a press release issued by Silva, she confirmed that she would appeal the suspension at CAS and has hired Brazilian legal service Franklin Advogados Associados to fight her case. 

"I fully trust that we will verify that the specified substance fenoterol accidentally entered my body and that it was not used for sports performance purposes," she said. 

"We will fight to the end for the dream of representing my country at the Tokyo 2020 Olympics because I know that I have done nothing wrong and that in the end justice will prevail."

Silva has previously pleaded her innocence, denying deliberate wrongdoing and insisting a second test on August 29 did not show any traces of a banned substance.

This test was taken during the Judo World Championships in Tokyo, where Silva finished third in the under-57kg contest. 

The Brazilian Judo Confederation have also confirmed they support their athlete. 

Silva, who grew up in Rio de Janeiro's infamous "City of God" favela, became the first Brazilian judo world champion in 2013 and went on to earn her country's first gold medal at a home Olympic Games in Rio in 2016.

If her appeal is not successful at CAS, Silva is set to miss Tokyo 2020. 

Her case was the most high-profile of the 15 positive doping results from Lima 2019.