Teenager James lights up 400m final
Kirani James reaches the finish line in under 44 seconds
Nineteen-year-old Kirani James stormed to 400 metres gold, destroying the field to win in 43.94.
No one came close to catching the teenager from Grenada down the home straight as he crossed the line well ahead of another 19-year-old, Luguelin Santos of the Dominican Republic. Trinidadian Lalonde Gordon took the bronze.
James gave Grenada their first ever Olympics medal, and he told BBC1: "The whole place will be going crazy right now. They'll all be celebrating (in Dominican Republic) now."
Felix Sanchez became the oldest ever winner of an Olympic sprint event as he reclaimed the 400 metre hurdles crown.
The 34-year-old from Dominican Republic took gold in Athens eight years ago but was not considered a genuine medal contender. But he stunned the rest of the field to come home in 47.63 seconds and edge American Michael Tinsley into second with Javier Culson third. Sanchez said: "No-one expected this. A lot of people said I should retire but I stuck with it."
Yuliya Zaripova took gold in the women's 3,000m steeplechase, clocking a new personal best of 9:06.72. The Russian was an impressive winner, streaking clear down the home straight to cross the line ahead of Tunisia's Habiba Ghribi.
American Jennifer Suhr dethroned Yelena Isinbayeva as pole vault queen by taking gold in 4.75m. She won on countback from Cuban Yarisley Silva, while the great Russian, who had been two-time reigning Olympic champion and is the world record holder, had to settle for bronze.
Australian Sally Pearson impressed in the women's 100 metre hurdles, confirming her status as gold-medal favourite. Pearson recorded the fastest time ever in the opening round of an Olympics, a 12.57 second effort which eased her through to the semi-finals.
American Lolo Jones was the second fastest qualifier in 12.68sec but Brigitte Foster-Hylton from Jamaica, regarded as a contender for a podium place, hit a hurdle and crashed out.
World record holder and 2011 world champion David Rudisha cruised through in the 800m, as did Sudan's Abubaaker Kaki. Nadzeya Ostapchuk of Belarus won Olympic gold in the women's shot put.
latest olympic videos
Highlights from Day Four of the 2014 Youth Olympics in Nanjing including swimming, weightlifting and the Games' newest sports rugby sevens a... More Highlights from Day Four of the 2014 Youth Olympics in Nanjing including swimming, weightlifting and the Games' newest sports rugby sevens and golf
Date 16 hrs ago, Duration 5:45, Views 6