Jamaican sprint star gains eighth Olympic gold as Britain's Adam Gemili just misses a medal and Ashton Eaton equals Olympic decathlon record to retain title
American leads four athletes, including Ireland's Thomas Barr, to sub-48 seconds, while both GB sprint relay teams advance and Morgan Lake equals UK junior record to make high jump final
The British heptathlete is placed 40 points behind Brianne Theisen-Eaton after four events at the Gotzis Hypo Meeting, while Damian Warner leads the decathlon after five events
With gender equality and innovation in mind, female athletes could contest the 10-event decathlon rather than the seven-discipline heptathlon at the Rio Olympic Games
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