World Athletics: Dwain Chambers out of 200m with calf injury

Dwain Chambers has withdrawn from the 200 metres in the World Championships in Berlin, citing a calf injury.

Chambers finished sixth in the final of the 100m on Sunday night, clocking a season's best of 10.00 seconds in a race won by Usain Bolt in a new world record of 9.58secs.

The heats of the 200m begin on Tuesday evening in the Olympic Stadium, with Bolt set to go for a second victory. American Tyson Gay is the defending champion but is struggling with a groin injury.