Video will play in Play now Don't auto playNever auto playThe American 5,000-metre runner whose act of friendship towards New Zealand's Nikki Hamblin captured the Olympic spirit will not return to the track in Rio after tearing ligaments in her knee. Instead of scrambling up to keep running, D'Agostino went to Hamblin, helped her up and urged the New Zealander to keep running. Read more:Fallen runners Nikki Hamblin and Abbey D'Agostino hardly heroes - Chris Rattue'Humble' Kiwi runner Nikki Hamblin's heart-tugging moment no surprise to club and colleaguesStrangers at the starting line, but now eternally linkedBut D'Agostino got the worst of the collision. Race officials advanced both runners into Friday's final, but D'Agostino can't go.No regrets, she said. Hamblin has indicated she will run in the final.

Source: New Zealand Herald August 17, 2016 16:52 UTC