Olympic 400m: Teenager Kirani James wins gold for Grenada

World champion Kirani James wins a first Olympic gold for Grenada with a stunning 400m victory in London.

Luguelin Santos of the Dominican Republic finishes second to become the youngest Olympic 400m medallist in history, while Trinidad and Tobago's Lalonde Gordon takes bronze.

Watch Monday's athletics on BBC Sport's interactive video player.

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  • Olympics