Heber Williams Viera da Silva (born April 29, 1979) is a Uruguayan sprinter who has been prominent in South American sprints since the turn of the century. He competed at the Summer Olympics in 2000, 2004 and 2008, being knocked out in the heats each time.

Viera represented Uruguay at the 2008 Summer Olympics in Beijing. He competed at the 200 metres and placed sixth in his first round heat in a time of 20.93 seconds, which was not enough to advance to the second round.

Competition record Representing 1996South American Junior ChampionshipsBucaramanga, Colombia3rd100 m10.52nd200 m20.9 (w)6th4 × 400 m relay3:28.31997South American ChampionshipsMar del Plata, Argentina8th100 m10.77Pan American Junior ChampionshipsSan Carlos, Uruguay8th200 m22.20South American Junior ChampionshipsSan Carlos, Uruguay2nd100 m11.041st200 m21.573rd4 × 100 m relay42.581998South American Junior ChampionshipsCórdoba, Argentina1st200 m21.33 (w)5th4 × 100 m relay42.11World Junior ChampionshipsAnnecy, France21st (qf)200 m21.58South American GamesCuenca, Ecuador4th100 m10.532nd200 m21.01999South American ChampionshipsBogotá, Colombia3rd100 m10.153rd200 m20.76 (w)4th4 × 100 m relay40.14Pan American GamesWinnipeg, Canada8th200 m21.19World ChampionshipsSeville, Spain –200 mDQ2000Ibero-American ChampionshipsRio de Janeiro, Brazil6th100 m10.654th200 m21.19Olympic GamesSydney, Australia55th (h)100 m10.5430th (qf)200 m20.972001World Indoor ChampionshipsLisbon, Portugal15th (h)200 m21.55South American ChampionshipsManaus, Brazil3rd100 m10.372nd200 m20.683rd4 × 100 m relay40.34World ChampionshipsEdmonton, Canada24th (qf)200 m20.832002Ibero-American ChampionshipsGuatemala City, Guatemala1st100 m10.08 (w)2nd200 m20.462003World Indoor ChampionshipsBirmingham, United Kingdom –200 mDQSouth American ChampionshipsBarquisimeto, Venezuela2nd100 m10.331st200 m20.60Pan American GamesSanto Domingo, Dominican Republic5th200 m20.85World ChampionshipsParis, France32nd (h)200 m20.872004World Indoor ChampionshipsBudapest, Hungary18th (h)200 m21.36Ibero-American ChampionshipsHuelva, Spain3rd200 m21.30Olympic GamesAthens, Greece35th (h)200 m20.942005South American ChampionshipsCali, Colombia3rd100 m10.432nd200 m20.62 (w)World ChampionshipsHelsinki, Finland48th (h)200 m21.712006Ibero-American ChampionshipsPonce, Puerto Rico3rd100 m10.452nd200 m20.80South American ChampionshipsTunja, Colombia –100 mDQ3rd200 m21.102007South American ChampionshipsSão Paulo, Brazil2nd200 m20.59Pan American GamesRio de Janeiro, Brazil19th (h)200 m21.292008Ibero-American ChampionshipsIquique, Chile7th100 m10.9411th (h)200 m21.74Olympic GamesBeijing, China34th (h)200 m20.932011South American ChampionshipsBuenos Aires, Argentina14th (h)100 m11.1714th (h)200 m22.45

Personal bests 100 metres - 10.08 (2002) 200 metres - 20.46 (2002)

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