Track stars take their marks

Marion Jones of the United States in her quest for five golds.

Kelly Holmes of Great Britain starts in her first round heat of the 800m.

Defending champion Michael Johnson of the United States in the 400m.

US sprint star Maurice Greene runs his first ever Olympic race in a first round heat of the 100m.

Ato Boldon gets off to a flying start during his 100m heat.

Dwain Chambers runs through the pain barrier to book a semi-final place in the 100m.

Britain's Darren Campbell thanks heaven after qualifying for the men's 100m semi-final.

...However Jason Gardner fails to make the grade and goes out in heat two.

Olympic 100m champion Donovan Bailey finishes last in his heat, failing to qualify for a semi-final place.