Bolt and Farah under spotlight in London

Usain Bolt's suspect hip and Mo Farah's status as the golden boy of British athletics will come under scrutiny when both return to London's Olympic stadium this weekend. The two-day so-called Anniversary Games, which incorporates a Diamond League meeting, features a glittering cast but six-times Olympic gold medallist Bolt is the undoubted top of the bill when he goes in the 100m on Friday.