Watch: 2012 volunteer Laviai Nielsen makes 400m final
Dame Jessica Ennis-Hill praises Laviai Nielsen after she wins her 400m semi-final with a personal best, six years on from being a volunteer at the London 2012 Olympics.
Dame Jessica Ennis-Hill praises Laviai Nielsen after she wins her 400m semi-final with a personal best, six years on from being a volunteer at the London 2012 Olympics.