Usain Bolt, Tyson Gay, Justyn Warner and the rest of the field look to move to the next round
Spectators gathered to watch Usain Bolt of Jamaica and the other sprinters compete in his Round 1 Men’s 100 metres heat during the 2012 Summer Olympic Games in London on August 4, 2012.PHIL NOBLE/Reuters
There were a total of seven heats in Round 1, with athletes vying for one of 27 spots in the semi-finals.PAWEL KOPCZYNSKI/Reuters
Defending Olympic champion Usain Bolt of Jamaica gestures before his Round 1 heat.PHIL NOBLE/Reuters
Britain's Adam Gemili leads the fifth-heat sprinters out of the blocks. Jamaica’s Asafa Powell won the heat to qualify for the semi-finals.KAI PFAFFENBACH/Reuters
Jamaica’s Bolt and Great Britain’s James Dasaolu both qualified for the next round.PAWEL KOPCZYNSKI/Reuters
Sprinters in the seventh heat of Round 1 run down the track.PAWEL KOPCZYNSKI/Reuters
Yohan Blake is one of three Jamaican sprinters to qualify for the semi-finals. To his right, Japan’s Ryota Yamagata and Antoine Adams of St. Kitts and Nevis also qualified from this heat.NEIL HALL/Reuters
Cameroon’s Idrissa Adam is injured while running next to Nigeria’s Ogho-Oghene Egwero, Jamaica’s Bolt and Great Britain’s Dasaolu.MAX ROSSI/Reuters
American Ryan Bailey and Canadian Justyn Warner will both move on. Warner posted the same 10.09 qualifying time as Usain Bolt on Saturday. For Warner it was a personal best.LUCY NICHOLSON/Reuters
Warner and Baily congratulate one another on their races.DAVID GRAY/Reuters
At 10.02, Dwain Chambers posted the fastest time out of the three British sprinters to make the final 27.PHIL NOBLE/Reuters
Usain Bolt zooms past onlookers.PHIL NOBLE/Reuters
Justin Gatlin, right, was one of three Americans to win their heats. Ryan Bailey and Tyson Gay were the others.PHIL NOBLE/Reuters
Bolt relaxes following his Round 1 heat.DYLAN MARTINEZ/Reuters
Ryan Bailey of the U.S. leads this Round 1 pack on Saturday.HANDOUT/Reuters
Justin Gatlin of the U.S. salutes after winning his Round 1 heat.DYLAN MARTINEZ/Reuters
Tyson Gay of the U.S., centre, runs next to 2008 silver medalist Richard Thompson of Trinidad and Tobago, right, and Zambia’s Gerald Phiri in Round 1. All three will run in the semi-finals on Sunday.LUCY NICHOLSON/Reuters