Wanyonyi leads the way into open 800m final as Kenya go for five in a row
Wanyonyi, silver medallist at last year’s world championship, was pushed at the end by American Bryce Hoppel but ensured he crossed the line first in 1:43.32 minutes.
Algeria’s Djamel Sedjati was an impressive winner of the first heat in 1:45.08, as was Canada’s world champion Marco Arop (1:45.05) in the second.
Max Burgin ran a personal best 1:43.50 to be the only one of three British semi-finalists to progress, while Gabriel Tual carries French hopes after also going through.
With none of the Tokyo medallists in the field and the eight finalists coming from eight different countries, it looks to be one of the most unpredictable races of the whole programme.