Olympic preparations intensify with Bolt's record ambitions and British medal targets, while marathon runners face health challenges and competition ahead of major events
Key Points
Usain Bolt aims to break his own 100m world record at London 2012, targeting 9.4 seconds in the sprint and 19 seconds in the 200m to "amaze" the world.
UK Athletics head coach Charles van Commenee expresses confidence that the British team can achieve its target of eight medals at the London Olympics.
UK Athletics will purchase tickets to guarantee that athletes' friends and families can attend and watch their performances at the London Olympics.
Emmanuel Mutai demonstrates determination to defend his London Marathon title on Sunday despite recovering from typhoid contracted last month.
Haile Gebrselassie abandons his Olympic dream and will not compete in the London 2012 marathon after his recent achievement of outpacing Paula Radcliffe in a Vienna half marathon.
Guernsey's Lee Merrien prepares for Sunday's London Marathon in peak condition, aiming to qualify for the Olympics through his performance.
Olympic 400m hurdles gold hopeful Dai Greene confirms his Diamond League season will launch in Rome on May 31, signaling his competition readiness.
British riders are positioned to compete strongly for Moto2 and Moto3 titles in the 2012 MotoGP season, with racing outside the top class expected to be highly competitive.