Olympic preparations dominate sports news as Bolt targets historic times, GB Athletics aims for medal goals, and marathon contenders prepare for London events

Usain Bolt sets ambitious targets for London 2012, aiming to run 100m in 9.4 seconds and 200m in 19 seconds to "amaze" the world at the Olympics.

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 is determined to defend his London Marathon title on Sunday despite recently recovering from typhoid fever last month.

Haile Gebrselassie abandons his Olympic aspirations and will not compete in the London 2012 marathon, ending his dream of Olympic participation.

Guernsey's Lee Merrien is in peak condition heading into Sunday's London Marathon where he will attempt to qualify for the Olympics.

Olympic 400m hurdles gold hopeful Dai Greene announces his Diamond League season will commence in Rome on May 31, 2012.

In a "Emperor versus the Queen" half-marathon showdown in Vienna, Haile Gebrselassie convincingly defeats Paula Radcliffe.

British riders are positioning themselves to compete for titles in the Moto2 and Moto3 classes as part of a notable British invasion in motorcycle racing outside the top MotoGP class.