It differed in the end two seconds between the teams and the American runners could note that the country's streak with final positions was intact.
The shock was total when the USA on Saturday for the first time ever seemed to miss the final on 4x400 meters.
Both the USA and Kenya got one of their relays destroyed by the runner from Zambia blocking the relays. After protests from several countries Zambia was disqualified.
The final will be decided at about 13.20 Swedish time.
