In the air-conditioned Khalifa Stadium, the World leader Christian Coleman produced the fastest time by comfortably winning the heat 6 with the time of 9.98 seconds. Coleman was the only man in the heats to break the 10-second barrier.
South Africa's Akani Simbine produced the 2nd fastest time in heats of 10.01 to win heat 1.
37-year-old Justin Gatlin, the defending World champion, qualified for the semi-finals with the 3rd fastest time of 10.06 from heat 2.
Former World champion Johan Blake advanced to semi final by winning heat 4.
Men's 5000m heats:
In heat 1, the 19-year-old Solomon Berega of Ethiopia, the World indoor 3000m silver medalist, prevailed with 13:24.69.
American Paul Chelimo lost his left shoe in the middle of the race but still managed to win the heat 2 with the fastest qualifying time of 13:20.18.
Norway's 19-year-old running sensation, Jacob Ingebrigset, who was one of the favourite runners to win gold, was disqualified after he qualied for the final by placing in 4th place in heat 1. Replays showed Jacob stepping on the inside of the track after he was bumped by runner from outside, and despite the infraction appearing relatively minor, he was removed from the final result. The decision means that Great Britain’s Andy Butchart will advance to Monday’s final as a fastest loser, after he was upgreaded to sixth place. Jacob is also enterd in the 1500m where he is real contender for the podium.
Jacob's oldest brothers Filip and Henrik both qualified for the 5000m final from heat 2. Filip placed 3rd to qualify automatically while Henrik placed 7th to qualify as one of the fastest loosers.
Women's 800m heats:
The women’s 800 meters heats began without double Olympic champion, Caster Semenya, who has been locked in a battle over her testosterone levels with the athletics authorities.
Uganda's Winnie Nanyondo was the fastest women in the heats with 2:00.36 from heat 3.
Americans Ajee Wilson, the 800m World leader and the favorite for gold, and Raevyn Rogers who went 1-2 in the Diamond League final 4 weeks ago, comfortably won the opening two heats.
Women's 3000m heats:
Kenyan's qualified 3 runners for the final with World record holder Beatrice Chepkoech leading the heats with 9:18.01.
The reigning World champion Emma Coburn and World silver medalist Courtney Frerichs of the United States and Germany's Gesa Felicitas Krause, the 2015 World championships bronze medalist also qualified for the final.
Men's 400m hurdles
In the men's 400m hurdles heats, gold medal contenders Karsten Warholm, Abderrahman Samba, Rai Benjamin and Thomas Barr, comfortably qualified for tomorrow's semi-final.
Men's long jump qualification:
Cuba's World indoor champion Juan Miguel Echevarria led the men's long jump with 8.40m, the longest ever jump in the qualification rounds at the World athletics championships since 1999.
Word champion Luvo Mannyonga of South Africa was lucky to qualify for the final by placing 10th with 7.91m jump. Olympic champion Jeff Henderson of the United States and Japan's World junior champion Yuki Hashioka comfortably qualified for Sunday's long jump final.