The semi-finals and final of the men's 100m take place tonight at Olympic Stadium, with Usain Bolt favourite to take gold at the London 2012 Olympic Games.
Saturday saw the main contenders all progress to this evening's three semi-final heats, with Yohan Blake, Tyson Gay, Justin Gatlin and Asafa Powell all just one race away from getting the opportunity to take Bolt’s 100m title.
The semi-finals are scheduled for 19:45 BST and will air live in the UK on BBC One/BBC One HD.
The final will then take place at around 21:50 BST.
Defending Olympic champion Bolt won his 100m heat on Saturday with a time of 10.09 seconds to qualify for this evening's semi-finals.
Training partner Blake was slightly quicker than his compatriot, winning his heat in 10 seconds flat.
American duo Gatlin and Bailey clocked 9.97 and 9.88 respectively, while the British men's trio all qualified for the semi-finals after all placing within the top three in their respective heats.
The world junior champion, Adam Gemili came second to Asafa Powell, while Dwain Chambers won his heat with an impressive time of 10.02 seconds.
James Dasaolu came third in his heat against Bolt.
St Kitts and Nevis sprinter Kim Collins on Saturday dramatically dropped out of the Olympics after falling out with his team for visiting his wife.
Collins says he was given permission to see her for a night, but St Kitts and Nevis officials said they had not heard from him for three days and cancelled his accreditation for the Games.
"Even men in prison get their wives to visit," said Collins, 36.
Speaking to BBC Radio 5 live, he said: "What am I supposed to do? I'm going home. My accreditation was cancelled. I am not walking away, I was pushed out."