Nigeria 's 4 x 400 m team were denied victory when Team USA 's gold was stripped . Under appeal , the Court of Arbitration for Sport ( CAS ) overturned the ruling and allowed the USA to keep their medals , but not for long . Antonio Johnson , of Team USA , admitted doping during the Sydney Olympics in 2008 . The Nigerian athletes have still yet to be given their gold medals won in 2000 . Former 400 m runner and member of Nigerian relay team Sunday Johnson died in hospital .
Nigeria 's 4 x 400 m team were denied victory when Team USA 's gold was stripped . Antonio Johnson , of Team USA , admitted doping during the Sydney Olympics in 2008 . The Nigerian athletes have still yet to be given their gold medals won in 2000 . Former 400 m runner and member of Nigerian relay team Sunday Johnson died in hospital .