VIDEO: The fast Men’s 400m Semifinals at World Championships in Beijing

Semifinal 1 (Kirani James, Luguelìn Santos, David Verbung)

Semifinal 2 (Isaac Makwala, Yousef Ahmed Masrahi, Rabah Yousif)

Semifinal 3 (Wayde Van Niekerk, LaShawn Merritt, Machel Cedenio)