2010 World Junior Championships in Athletics – Men's 400 metres

The men's 400 metres event at the 2010 World Junior Championships in Athletics was held in Moncton, New Brunswick, Canada, at Moncton Stadium on 20, 21 and 22 July.

22 July

21 July

20 July

According to an unofficial count, 44 athletes from 31 countries participated in the event.

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