Samba, 22, who represents Qatar, won in 46.98. Only American Kevin Young has run faster, with 46.78 in 1992.

“The world record is getting closer,” Samba said. “I improved technique since last year and, who knows, maybe I can be a second faster next year.”

Also in Paris, Caster Semenya ran the fourth-fastest women’s 800m in history.

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