Desmond Lynam introduces further coverage from the first day of the 26th Olympiad, including the swimming competition. There's also live coverage from the judo arena, and boxing action. Plus a preview of the hockey, which has already seen women's champions Spain in action. Great Britain's women start theircampaign tonight. Stereo . ♦ On their marks ... page 6; Olympic supplement starts on page 28; Reader offer: page 47