Usain Bolt has arrived in Moscow for the World Championships which begin on Saturday.
The Jamaican sprinter is determined to win back the 100m title he won in 2009. At the last World Championships in 2011 he lost to countryman Yohan Blake after being disquailified for a false start in the final in Daegu.
His hopes will have been aided by the weakened field following the drugs bans handed out to Asafa Powell and Tyson Gay, and Bolt tells his rivals "I'm focused and I'm ready to go".
In the video above Bolt touches on those drug bans and offers an update on the proposed 600m race between himself and Mo Farah.