Haroun won his heat in a new world's best time of 59.83 becoming the first man in history to run the distance below 60 seconds.
Last year the 19- year-old quarter miler shocked everyone after he showed up literally from "nowhere" and ran a sensational Asian record of 45.39 seconds in 400m indoors at XL Galan meeting.
M 500 m A1 | ||||||
1 | Abdalelah Haroun | 97 | QAT | 59.83 | WL | ||
2 | Onkabetse Nkobolo | 93 | BOT | 1:00.71 | |||
3 | Calvin Smith | 87 | USA | 1:01.67 | PB | ||
4 | Felix Francois | 90 | SWE | Örgryte IS | 1:02.54 |