Liz "McGolden" McColgan, arguably Britain's brightest gold medal hope on the track, and team-mate Jill Hunter seek a comfortable journey through the heats of the women's 10,000m before getting down to more serious business in next Friday's final. McColgan, a relentlessly determined frontrunner, was Britain's only individual gold medallist at last year's world championships, and went on to be named BBC Sports Personality of the Year.
Plus a roundup of the other action, on the day that the men's 100m final was run.
Britain's Linford Christie was looking to improve on his silver medal in Seoul four years ago. Has he succeeded in his bid to become the oldest man ever to win the Olympic 100m title? And in the rowing, Steve Redgrave was trying to make it three gold medals in three successive Games by winning the coxless pairs with his new partner, the talented Oxford blue Matthew Pinsent.