The early stages of the 5000m final played out in an almost identical manner to the 10,000m with Ethiopia's Almaz Ayana making a huge surge after a ponderous opening to proceedings but while the Kenyan challenge fettered away in the 10,000m, Hellen Obiri produced an irresistible burst of speed on the last lap to deny the reigning champion a much vaunted long distance double.
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