Usain Bolt took his World Championships career medal tally into double figures by anchoring Jamaica to gold in the 4x100 metres relay in Moscow tonight.

Dwain Chambers admitted emotions had to be “put to one side” as he prepared to compete in his first relay for Great Britain for six years.

Usain Bolt completed his hat-trick of sprint titles at the World Championships tonight..

Dwain Chambers has been warned he cannot simply stroll on to Britain’s 4x100m relay team if he manages to overturn his Olympic ban.