400m champion Niekerk

Rio Olympic neih mekah South Africa sprin-ter Wayde van Niekerk chuan second 43.03 chhunga 400m tlan thlengin gold medal a dawng a, kum 1999-a Michael Johnson-a'n Olympic record a lo siam tawh chu second 0.15 in a khum.

Grenada tlangval Kirani James chuan silver medal a dawng a, London 2012 champion-in pakhatna tluk lohna hi second 0.73 a ni. American sprinter LaShawn Merritt chu pathumna niin bronze medal a dawng