SA's Semenya safely through 800m heats

South Africa's Caster Semenya comfortably qualifies for the semi-finals of the women's 800m, finishing second behind US runner Alysia Johnson Montano.

Montano set off quickly and held onto her lead throughout to move into Thursday's semi-finals.

Watch a full replay of the women's 800m heats on the BBC Sport interactive player.

Available to UK users only.

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