2011 European Athletics U23 Championships – Men's 400 metres  The Men's 400 metres event at the 2011 European Athletics U23 Championships was held in Ostrava, Czech Republic, at Městský stadion on 14 and 16 July.  16 July 2011 / 16:40  Qualified: First 2 in each heat (Q) and 2 best performers (q) advance to the Final 14 July 2011 / 19:10 14 July 2011 / 19:17 14 July 2011 / 19:24 According to an unofficial count, 21 athletes from 14 countries participated in the event.