Watch out London, Usain is coming… Bolt travels to capital as Jamaican superstar prepares for Games

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UPDATED:

10:56 GMT, 26 July 2012

On his way: Usain Bolt

Look who's on his way to the Olympic village.

Usain Bolt, the undoubted biggest star of these London Games, used his Twitter account on Thursday to tell the world he was on the way from Birmingham to the capital.

The defending 100m and 200m champion
has been training in Birmingham. There has been some talk of whether he
is properly fit, especially after he didn't show up to an open training
session on Tuesday.

The 100m heats take place on August 4, with the semi-finals and final on August 5.

At one stage, Bolt looked to be an overwhelming favourite, but Yohan Blake has proved to be a formidable rival this year.

Earlier this week, Bolt predicted he could run a time of 9.4 seconds, and hoped it would happen at the London Games.

'You can’t be sure when or where you can run a time like 9.4.

Pushing the limit: Bolt grimaces as his physio goes to work but coach Mills looks relaxed

'But the major competitions are when I take it really seriously and shine through — that’s business time.

'It is impossible to run 9.2. The body isn’t made to go that fast no matter how hard you train, how good a shape you’re in or how good your technique.'

Unforgettable: Usain Bolt wins the 200m at the Beijing Olympics

Bolt stunned the world at the Beijing Olympics in 2008, winning both the 100m and 200m titles with new world records.

He repeated the trick at the World Championships in Berlin a year later. At the 2011 World Championships, he won 200m gold, but was disqualified from the 100m after a false start.