Noah Lyles storms into history books with world 200m gold in 19.31sec

• Lyles leads second US clean sweep of championship
• 25-year-old breaks Johnson's longstanding US record

Noah Lyles produced a dominating performance to retain his 200m title in 19.31sec at the world championships on Thursday, becoming the third-fastest athlete of all time over the distance and leading a second American sprint podium sweep.

Lyles, who won Olympic bronze in Tokyo, led at the halfway point and exploded through the finish, with his compatriots Kenny Bednarek (19.77) and 18-year-old Erriyon Knighton (19.80) battling out of the turn and down the straight for silver and bronze.