Sandro Ricardo Rodrigues Viana (born March 26, 1977, in Manaus) is a track and field sprint athlete who competes internationally for Brazil.

Viana represented Brazil at the 2008 Summer Olympics in Beijing. He competed at the 100 metres sprint and placed 6th in his heat without advancing to the second round. He ran the distance in a time of 10.60 seconds. Together with José Carlos Moreira, Vicente de Lima and Bruno de Barros he also competed at the 4 × 100 metres relay. In their qualification heat they placed fourth behind Trinidad and Tobago, Japan and the Netherlands. Their time of 39.01 was the seventh out of sixteen participating nations in the first round and they qualified for the final. There they sprinted to a time of 38.24 seconds, the fourth time after the Jamaican, Trinidad and Japanese teams. He also took part in the 200 metres individual, finishing fourth in his first round heat, with a time of 20.84 seconds. With 21.07 seconds in the second round he only placed seventh in his heat, which was not enough to qualify for the semi-finals.

At the 2012 Summer Olympics, he again competed in the 200 metres and the men's 4 × 100 m relay. He did not reach beyond the heats in the 200 m and the Brazilian men's 4 × 100 m team missed out on the final by 0.06 of a second.

Viana would retroactively be awarded the bronze medal for the 4 × 100 metres relay at the 2008 Summer Olympics following the demotion in 2017 of the Jamaican team for Nesta Carter's failed anti-doping test.

Competition record Year Competition Venue Position Event Notes2005Universiadeİzmir, Turkey 3rd100 m10.498th200 m21.4312th (h)4 × 100 m relay41.012007South American ChampionshipsSão Paulo, Brazil 1st200 m20.54 1st4 × 100 m relay38.77Pan American GamesRio de Janeiro, Brazil7th (sf)200 m20.82 1st4 × 100 m relay38.81World ChampionshipsOsaka, Japan35th (h)100 m10.4618th (qf)200 m20.684th4 × 100 m relay37.992008Ibero-American ChampionshipsIquique, Chile 1st200 m20.87 1st4 × 100 m relay38.96Olympic GamesBeijing, China50th (h)100 m10.6030th (qf)200 m21.07 3rd4 × 100 m relay38.242009Ibero-American ChampionshipsBerlin, Germany38th (h)200 m21.187th4 × 100 m relay38.562010Ibero-American ChampionshipsSan Fernando, Spain8th (h)100 m10.552011South American ChampionshipsBuenos Aires, Argentina 3rd100 m10.44 1st4 × 100 m relay39.87Pan American GamesGuadalajara, Mexico12th (sf)100 m10.497th200 m20.94 1st4 × 100 m relay38.182012Ibero-American ChampionshipsBarquisimeto, Venezuela 2nd100 m10.42 3rd200 m20.69 1st4 × 100 m relay38.95Olympic GamesLondon, United Kingdom43rd (sf)200 m21.0510th (h)4 × 100 m relay38.35

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