Armstrong defends time trial title

American Kristin Armstrong defends her Olympic time trial crown with a storming ride through south west London.

Watch as Armstrong dominates, recording the quickest time through the two intermediate splits on her way to a time of 37 minutes 35 seconds over the 29km course.

Britain's Emma Pooley did not repeat her medal-winning display in Beijing as the 2008 silver medallist could manage only sixth.

Watch the full women's Olympic time trial session here

Available to UK users only.

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