The IAAF has officially ratified the men and women 4x400m world record marks set at Maebashi World Championships
IAAF News

World Record Relays ratified by the IAAF

The IAAF has officially ratified the men and women 4x400m world record marks set at Maebashi World Championships... Read more

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The Record Relays

data supplied by Mark Butler... Read more

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Men 400m final

7 March report from men 400 m final... Read more

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Men 400m relay photo finish splits

event report from men 400m relay with photo control splits at handover included... Read more