Entering the final as a heavy favorite, Kerron Clement took home the United States' second track gold of the Rio Olympics with a 47.73 time in the 400m hurdles. He was fading a bit over the last two hurdles, but managed to hold off Kenyan Boniface Tumuti to win gold. Puerto Rico's Javier Culson was disqualified for a false start. Four national records were set in the event. Tumuti set a Kenyan NR of 47.78 for silver; Yasmani Copello got bronze in a Turkish record of 47.92; Thomas Barr of Ireland was fourth in a record 47.97l Rasmus Magi took 6th in a Estonian record of 48.40.