Jefferson leads USA to women's 4x100m relay win
Tamari Davis, Gabby Thomas, Celera Barnes and Melissa Jefferson win gold at the World Athletics Relays women's 4x100m with a championship record of 41.85 seconds.
Tamari Davis, Gabby Thomas, Celera Barnes and Melissa Jefferson win gold at the World Athletics Relays women's 4x100m with a championship record of 41.85 seconds.