<page_title> Athletics at the 2016 Summer Olympics </page_title> <section_title> Men </section_title> <table> <cell> 400 metres details <col_header> Event </col_header> </cell> <cell> Wayde van Niekerk South Africa <col_header> Gold </col_header> </cell> <cell> 43.03 WR <col_header> Gold </col_header> </cell> </table>
South Africa's Wayde van Niekerk won the men's 400 metres world record with a time of 43.03 seconds.