30 July 2011 Last updated at 13:36

Rebecca Adlington thanks supporters after gold win

Rebecca Adlington tells BBC Sport she knew she would have to battle to win gold in the 800m freestyle at the World Championships in Shanghai.

Adlington says she will concentrate on the 400m and 800m for London 2012, admitting she has not got the speed to be competitive in the 200m.

The double Olympic champion also says the support of her family, team and fans has helped her during the week.