WRAPUP 6-Olympics-Bolt does double-double, Rudisha breaks record (Reuters)

* Usain Bolt completes unique sprint 'double-double' * Kenyan Rudisha breaks own 800 metres world record * U.S. beat Japan 2-1 in women's soccer final * Briton becomes first woman Olympic boxing champion * U.S. overtake China in medals table (Updates with Bolt's 200 metres win, women's soccer final) LONDON, Aug 9 (Reuters) - Usain Bolt surged to the Olympic200 metres title on Thursday at the head of a Jamaican medalsweep to become the first man to win the 100 and 200m sprints atsuccessive Games. ...